A Guide how to Grow Onions in Arizona: Tips and Techniques


Welcome to the world of onion cultivation in Arizona! Whether you’re a seasoned gardener or a beginner, this guide will provide you with all the essential information you need to successfully grow onions in the unique climate of Arizona.


With proper planning and care, you can enjoy a bountiful harvest of flavorful onions in your own backyard.

By implementing the expert tips and techniques shared in this guide, you can embark on a journey that not only enhances your green thumb but also provides you with an abundant supply of homegrown onions packed with flavor and nutrition.

How to Grow Onions in Arizona

Understanding Arizona’s Climate for Onion Cultivation

Arizona, known for its vast desert landscapes and scorching summers, presents unique challenges for gardening and agriculture. To successfully grow onions in this southwestern state, it is crucial to have a deep understanding of the climate and its impact on plant growth.

Many people want to know that, how to grow onions in Arizona

Let’s explore the key characteristics of Arizona’s climate and how they affect onion cultivation.

Hot Summers

Arizona is known for its intense summer heat, with temperatures often exceeding 100°F (38°C) or more. Onions prefer cooler temperatures for optimal growth, typically between 55°F (13°C) and 75°F (24°C).

To mitigate the impact of the heat, it is essential to choose onion varieties that are tolerant of higher temperatures and have shorter growing seasons. These varieties are better suited to withstand the hot Arizona summers.

Low Humidity

Arizona is a desert state with low humidity levels. Onions require moderate humidity to thrive, ideally around 50% to 60%. In arid regions like Arizona, it is crucial to provide supplemental moisture and humidity to create a suitable microclimate for onion plants.

Techniques such as mulching, drip irrigation, and strategic planting can help conserve moisture and maintain higher humidity levels around the plants.


Monsoon Season

Arizona experiences a unique weather phenomenon known as the monsoon season, which typically occurs from July to September. During this period, the state receives a significant portion of its annual rainfall.

While this rain can provide much-needed moisture for onion plants, it is important to manage watering carefully, as excessive moisture can lead to rot and disease. Proper drainage systems and monitoring of soil moisture levels are crucial during the monsoon season.

Mild Winters

Although Arizona’s summers are scorching, its winters are relatively mild, making it an ideal time to grow onions. Onions are considered cool-season crops and require a period of cold temperatures to form bulbs properly.

The mild winters in Arizona offer an advantage in this regard, as they provide the necessary chilling hours without subjecting the plants to extreme cold. However, it is still important to select onion varieties that are adapted to the local climate and capable of withstanding mild frosts.

Selecting the Perfect Onion Varieties for Your Garden

Selecting the appropriate onion varieties is a critical step in successfully growing onions in Arizona’s unique climate. Different onion varieties have varying characteristics such as bulb size, flavor, storage life, and adaptability to specific growing conditions.

Here are some factors to consider when choosing the right onion varieties for your Arizona garden:

Day Length

Onions are categorized into three types based on their day-length requirements: short-day, intermediate-day, and long-day onions. Day length refers to the number of daylight hours needed for the onion plant to transition from the vegetative stage to bulb formation.

In Arizona, where daylight hours vary throughout the year, it is crucial to choose the appropriate day-length onion varieties. Short-day onions are well-suited for Arizona’s climate as they require fewer daylight hours to form bulbs, making them ideal for planting in the fall and winter.

Examples of short-day onion varieties include Grano, Texas Early White, and Red Burgundy.

Heat Tolerance

With Arizona’s scorching summers, it is essential to select onion varieties that are heat tolerant. Heat-tolerant onion varieties are better equipped to withstand the high temperatures and continue growing.

Look for varieties specifically bred for hot climates or those with a reputation for heat resistance. Some popular heat-tolerant onion varieties include Candy, Red Creole, and Sierra Blanca.

Bulb Size and Flavor

Consider the desired bulb size and flavor when choosing onion varieties. Some varieties are known for producing larger bulbs, while others are smaller and milder in flavor.

If you prefer larger bulbs for storage or culinary purposes, consider varieties like Texas Legend or Redwing.

For milder tasting onions that are great for salads and fresh use, Vidalia or Walla Walla varieties are popular choices.

Storage Life

If you intend to store onions for an extended period, select varieties known for their good storage capabilities. These onions are typically drier and have thicker skins, which help them last longer.

Look for varieties such as Copra, Yellow Sweet Spanish, or Red Wethersfield, known for their excellent storage qualities.

Disease Resistance

Consider onion varieties with resistance to common diseases prevalent in Arizona, such as onion white rot and downy mildew. Disease-resistant varieties can help minimize the risk of plant infections and ensure healthier onion crops.

Check seed catalogs or consult with local gardening experts for recommendations on disease-resistant onion varieties suitable for Arizona’s conditions.

Remember, choosing the right onion varieties for your Arizona garden is crucial for successful cultivation.

By selecting varieties that are well-suited to Arizona’s climate, you set yourself up for a rewarding onion-growing experience in the desert landscapes of this unique state.

Choosing the Perfect Time to Plant Onions in Arizona

how to grow onions in Arizona

Choosing the right planting time is crucial for successful onion cultivation. The timing of planting can greatly affect the growth, development, and overall yield of your onion crop.

Consider the following factors when determining the ideal planting time for onions in the southwestern state:

Seasonal Considerations

Arizona’s climate is characterized by hot summers and relatively mild winters. To maximize onion growth and bulb development, it is essential to plant onions during the appropriate seasons. In Arizona, onions can be grown during two primary planting seasons:

Fall/Winter Planting

Planting onions in the fall or early winter allows them to establish their root systems before the intense heat of summer arrives. This planting time takes advantage of the mild winter temperatures in Arizona, which provide the necessary chilling hours for bulb formation.

Fall-planted onions tend to produce larger bulbs and have a longer growing season, resulting in a higher yield. Plan to plant fall/winter onions from October to December.

Spring Planting

If you miss the fall planting window, you can also plant onions in the spring. As temperatures start to warm up, typically from February to March, it is crucial to plant onion sets or transplants that have already been started indoors. Spring-planted onions have a shorter growing season but can still yield satisfactory results.

Soil Temperature

Another critical factor to consider is soil temperature. Onions prefer cool soil temperatures for proper root development. Before planting, ensure that the soil temperature has reached around 50°F (10°C) or lower.

Cooler soil temperatures provide optimal conditions for root growth, allowing the onions to establish themselves more effectively. Use a soil thermometer to measure the temperature at the desired planting depth.

Daylight Hours

As mentioned earlier, onion varieties have specific day-length requirements for bulb formation. It is essential to consider the daylight hours during the planting season.

For short-day onion varieties, which are suitable for Arizona’s climate, fall and winter planting align well with the decreasing daylight hours. This helps trigger the bulb formation process.

Pay attention to the specific day-length requirements of the onion varieties you choose and ensure they correspond with the planting season.

Frost Risk

While Arizona’s winters are generally mild, there is still a risk of occasional frosts. When planning your planting time, consider the average frost dates in your specific region.

Planting too early can expose young onion plants to potential frost damage, while planting too late can limit their growth before the onset of hot summer temperatures.

Consult local frost date charts or seek guidance from agricultural extension services to determine the best time to plant onions in your area.

Planting at the right time ensures optimal growth, enhances bulb development, and increases the chances of a successful onion harvest.

Take advantage of Arizona’s mild winters or the early spring to establish your onion crops, and with proper care, you’ll be rewarded with flavorful and homegrown onions from your garden.

Preparing the Soil for Onion Growth

Proper soil preparation is essential for creating an optimal environment for onion growth in Arizona. Since onions have specific soil requirements, taking the time to prepare the soil before planting will greatly contribute to the success of your onion crop.

Consider the following steps to prepare the soil for growing onions:

Soil pH Testing

Onions prefer a slightly acidic soil pH ranging between 6.0 and 6.8. Before planting, test the soil pH using a soil testing kit or by sending a sample to a local agricultural extension service. If the pH is too high (alkaline), you can lower it by incorporating organic matter such as peat moss or elemental sulfur into the soil.

If the pH is too low (acidic), adding agricultural lime can help raise it to the desired level. Aim for a pH that falls within the ideal range to create a favorable growing environment for onions.

Organic Matter Amendment

Onions thrive in well-draining soils enriched with organic matter. Incorporating organic matter, such as compost or well-rotted manure, into the soil before planting will improve its structure, fertility, and water-holding capacity.

Spread a layer of organic matter over the planting area and work it into the top 6 to 8 inches of soil using a garden fork or tiller. This amendment will provide essential nutrients and improve soil texture, allowing for proper root development and nutrient uptake.

Nutrient Application

Onions have specific nutrient requirements for healthy growth and bulb formation. Before planting, it is beneficial to apply a balanced fertilizer or organic amendments to ensure the soil is rich in essential nutrients.

Consider using a fertilizer with a ratio such as 10-10-10 or 8-16-16, which provides a balanced supply of nitrogen (N), phosphorus (P), and potassium (K).

Follow the manufacturer’s instructions for application rates, and work the fertilizer into the soil to ensure even distribution. Organic alternatives like fish emulsion or bone meal can also be used as nutrient sources.

Soil Moisture Management

Onions require consistent soil moisture for proper growth. In arid Arizona, it is important to improve water retention in the soil to prevent excessive drying out. Adding organic matter, as mentioned earlier, helps improve soil moisture retention.

Additionally, applying a layer of organic mulch, such as straw or wood chips, around the onion plants can help conserve soil moisture, regulate soil temperature, and suppress weed growth. Mulching also reduces evaporation and the need for frequent watering.

Weed Control

Weeds can compete with onions for nutrients, water, and sunlight, hindering their growth. Before planting, clear the planting area of any existing weeds and their roots. Hand-pulling weeds or using a hoe can effectively remove them.

Applying mulch around the onions after planting will further suppress weed growth and make it easier to manage them throughout the growing season.

By following these soil preparation guidelines, you can create an ideal growing environment for onions in Arizona.

Properly balanced pH, enriched with organic matter, and supplemented with essential nutrients, your soil will support healthy root development, nutrient uptake, and vigorous onion growth.

With effective moisture management and weed control, your onions will thrive and reward you with a bountiful harvest of flavorful bulbs.

Providing Proper Watering and Drainage for Onions

Water is a crucial element for the successful growth of onions in Arizona’s arid climate. Adequate watering and proper drainage are essential to ensure that onion plants receive the right amount of moisture while avoiding the risk of waterlogging or excessive drying out.

Here are some key considerations for providing proper watering and drainage for onions:

Watering Schedule

Onions require consistent moisture throughout their growing season, especially during bulb formation. It is important to establish a regular watering schedule to meet their water needs.

In general, onions need approximately 1 inch (2.5 cm) of water per week, including rainfall. However, adjust the watering frequency and duration based on the specific soil conditions, weather patterns, and onion stage of growth.

During hot and dry periods, you may need to increase the frequency of watering to prevent stress and dehydration.

Deep Watering

When irrigating onions, it is crucial to ensure deep watering to encourage strong root development. Shallow watering can result in shallow root systems, making the plants more susceptible to heat stress and drought.

Apply water slowly and deeply, allowing it to penetrate the soil to a depth of 6 to 8 inches (15 to 20 cm) or more. This promotes deeper root growth and helps the plants access water during periods of heat or drought.


Applying a layer of organic mulch around onion plants can significantly help with water conservation. Mulch acts as a barrier, reducing evaporation from the soil surface and keeping the soil moisture levels more consistent.

Apply mulch, such as straw or wood chips, after the soil has warmed up and the onion plants have become established. Maintain a layer of mulch that is 2 to 3 inches (5 to 7.5 cm) thick, ensuring it does not touch the onion stems to prevent potential rot or disease.

Soil Moisture Monitoring

Regularly monitor the moisture levels in the soil to ensure that the onions are receiving adequate water without becoming waterlogged.

Check the moisture level by inserting your finger or a soil moisture meter into the soil around the onion plants. Ideally, the soil should be consistently moist but not waterlogged.

Avoid allowing the soil to completely dry out between watering, as this can lead to stunted growth and reduced bulb development.

Proper Drainage

Onions require well-drained soil to prevent waterlogging, which can lead to root rot and other fungal diseases. To promote proper drainage, ensure that the planting area has good soil structure and is not compacted. Incorporating organic matter, as mentioned earlier, can improve soil drainage.

Additionally, avoid overwatering or applying excessive amounts of water at once, as this can saturate the soil and hinder proper drainage. If necessary, amend heavy clay soils with sand or perlite to enhance drainage.

Irrigation Methods

Consider using irrigation methods that provide a slow, steady supply of water directly to the onion roots. Drip irrigation or soaker hoses are effective options as they minimize water wastage and allow for targeted watering at the root zone. Avoid overhead sprinklers that can lead to foliage wetting, increasing the risk of fungal diseases.

Fertilizing and Mulching the Onion Plants

Fertilizing and mulching play vital roles in promoting healthy onion growth, providing essential nutrients, conserving moisture, and suppressing weed growth.

Properly nourishing and mulching onion plants in Arizona’s unique climate will help maximize their productivity and overall health.

Consider the following guidelines for fertilizing and mulching onion plants:


Soil Testing: Before applying fertilizers, conduct a soil test to determine the nutrient levels and pH of the soil. This information will guide you in selecting the appropriate fertilizers and making necessary adjustments to the soil pH if required.

Balanced Fertilizer: Onions have specific nutrient requirements throughout their growth stages. Apply a balanced fertilizer with a ratio such as 10-10-10 or 8-16-16 to provide a steady supply of essential nutrients.

These ratios represent the percentages of nitrogen (N), phosphorus (P), and potassium (K) in the fertilizer, respectively. Nitrogen promotes leafy growth, phosphorus supports root development, and potassium enhances overall plant health and disease resistance.

Application Rates: Follow the manufacturer’s instructions for the recommended application rates of the fertilizer. Generally, onions require a light application of fertilizer at planting and subsequent side-dressings during their growth.

Apply the initial dose of fertilizer when preparing the soil before planting, and then side-dress the plants with additional fertilizer about four to six weeks after planting. Avoid excessive fertilizer application, as it can lead to lush foliage growth at the expense of bulb development.

Organic Alternatives: If you prefer organic fertilizers, options such as compost, well-rotted manure, or organic soil amendments can be used to provide nutrients to the onion plants.

Apply these organic fertilizers according to the recommended rates and incorporate them into the soil during soil preparation or as a side-dressing during the growing season.


Timing: Apply mulch around the onion plants once they are established and have developed a good root system. This is typically done a few weeks after planting.

Applying mulch too early can hinder the warming of the soil, delaying growth and bulb development.

Organic Mulch: Use organic mulch, such as straw, dried grass clippings, or wood chips, to create a protective layer around the onion plants.

Apply a layer of mulch that is about 2 to 3 inches (5 to 7.5 cm) thick. Ensure that the mulch does not touch the onion stems to prevent potential rot or disease.

Benefits of Mulching: Mulching offers numerous benefits to onion plants. It helps conserve moisture by reducing evaporation from the soil surface, minimizing water stress and the risk of drying out. Mulch also acts as a barrier, suppressing weed growth and reducing competition for nutrients and water.

Additionally, it helps regulate soil temperature, keeping the soil cooler during hot summers and providing insulation during cooler periods.

Mulch Maintenance: Regularly check the mulch layer and replenish it as needed to maintain the desired thickness. Mulch can break down over time, so adding fresh mulch annually or as necessary will help retain its benefits.

The right balance of fertilization and mulching practices will support healthy onion growth, improve bulb development, and contribute to a successful harvest.

Monitor the plants’ health and adjust fertilization and mulching practices as needed throughout the growing season to ensure optimal onion growth in Arizona’s unique climate.

Managing Pests and Diseases

When growing onions in Arizona, it is important to be vigilant about managing pests and diseases that can affect the health and productivity of your onion plants.

Taking proactive measures and adopting proper cultural practices can help minimize the risks associated with pests and diseases.

Here are some strategies to effectively manage pests and diseases in your onion garden:

Pest Identification

Familiarize yourself with common pests that can attack onion plants in your area, such as onion thrips, onion maggots, and aphids.

Regularly inspect your plants for signs of infestation, including wilting, yellowing leaves, distorted growth, or the presence of pests themselves. Early detection allows for prompt intervention and better control.

Integrated Pest Management (IPM)

Implement an integrated approach to pest management by combining various strategies. This includes cultural practices, biological controls, and, if necessary, judicious use of pesticides.

Start with the least harmful methods and resort to pesticides only when other options have proven ineffective.

Cultural Practices

Crop Rotation: Practice crop rotation by avoiding planting onions or related crops in the same location for consecutive years. This helps disrupt pest life cycles and reduces the buildup of pests and diseases in the soil.

Sanitation: Maintain a clean garden environment by removing plant debris and weeds that can harbor pests and diseases. Properly dispose of infested plant material to prevent the spread of pests.

Healthy Soil: Maintain healthy soil through proper fertilization and soil amendments. Strong, healthy plants are more resilient to pests and diseases.

Biological Controls: Encourage natural predators and beneficial insects that feed on pests. Ladybugs, lacewings, and parasitic wasps are examples of beneficial insects that can help control aphids and other pests. Consider planting companion plants that attract beneficial insects, such as marigolds or alyssum.

Organic Remedies: Explore organic pest control methods to manage pests without synthetic chemicals. Neem oil, insecticidal soaps, and botanical insecticides derived from plants can be effective against certain pests. Follow the instructions carefully and apply these remedies when pests are actively present.

Disease Prevention:

Proper Spacing: Provide adequate spacing between onion plants to promote airflow and reduce the chances of diseases spreading.

Water Management: Avoid overwatering, as excessive moisture can create favorable conditions for fungal diseases. Water the soil directly, keeping the foliage dry.

Disease-Resistant Varieties: Consider planting onion varieties that are known to have resistance to common diseases prevalent in your area. Consult local nurseries or extension services for suitable varieties.

Crop Removal: Remove and destroy any diseased plants or plant parts to prevent the spread of diseases.

Monitoring and Early Intervention: Regularly monitor your onion plants for signs of diseases, such as yellowing leaves, rot, or unusual spots. If you detect any issues, take immediate action by applying appropriate remedies or seeking guidance from agricultural extension services.

Harvesting and Storing Onions

Knowing when and how to harvest onions is crucial to ensure optimal flavor, storage quality, and overall satisfaction with your harvest. Harvesting onions in Arizona requires careful timing and proper handling to maximize their storage potential.

Here are the steps to follow for harvesting and storing onions:

Timing the Harvest

Onions are ready to be harvested when the tops begin to yellow and fall over naturally. Monitor the plants closely, and once approximately half of the tops have fallen over, it is an indication that the onions have reached maturity.

Harvesting too early can result in underdeveloped bulbs, while leaving them in the ground for too long may lead to excessive softness or rot.


Choose a dry day to harvest onions, as wet conditions can increase the chances of spoilage during storage. Gently loosen the soil around the onions using a garden fork or shovel. Carefully lift the onions out of the ground, taking care not to damage the bulbs or bruise the skin.

Avoid pulling the tops to lift the onions, as this can result in detached tops and compromised storage quality.


After harvesting, place the onions in a well-ventilated area to cure. This process allows the outer layers of the bulbs to dry and toughen, which enhances their storage capacity. Spread the onions in a single layer or hang them in mesh bags or braids.

Ensure good air circulation and protect them from direct sunlight. The curing process typically takes 1-2 weeks, during which the necks should shrink and the outer skins should become papery and dry.

Trimming and Cleaning

Once the onions have fully cured, trim the tops to about 1 inch (2.5 cm) above the bulb. Remove any excess soil, but avoid removing the outer skin or cleaning the bulbs excessively, as this can increase the risk of spoilage during storage.

Storage Conditions

Onions prefer cool and dry storage conditions. Choose a well-ventilated area with a temperature range of 32 to 40°F (0 to 4°C) for long-term storage. Avoid storing onions near potatoes, as they can release moisture and gases that accelerate spoilage.

Additionally, keep onions away from areas with high humidity or exposure to sunlight.

Storage Containers

Place the cured and trimmed onions in suitable storage containers such as mesh bags, nylon stockings, or wooden crates. These containers allow for airflow and help prevent moisture buildup.

Avoid using plastic bags, as they can trap moisture and promote rot.

Regular Inspections

Periodically check stored onions for any signs of decay or rot. Remove any onions showing signs of deterioration to prevent the spread of spoilage to other bulbs.

Usage and Shelf Life

Use the onions with intact skin and firm texture first, as they have a longer storage life. Onions suitable for long-term storage can last several months when stored properly.

By following these guidelines for harvesting and storing onions, you can enjoy the fruits of your labor for an extended period. Properly cured and stored onions will maintain their flavor, texture, and quality, allowing you to enjoy them in various culinary preparations throughout the year.

Tips for Successful Onion Cultivation in Arizona

Growing onions in Arizona’s unique climate can be challenging, but with the right techniques and practices, you can achieve a successful onion harvest.

Here are some tips to help you cultivate onions successfully in Arizona:

Select the Right Varieties

Choose onion varieties that are well-suited for Arizona’s climate. Look for varieties specifically bred for hot and arid conditions. These varieties are more tolerant of high temperatures and can better withstand the challenges posed by the desert climate.

Timing is Crucial

Pay attention to the timing of onion planting. In Arizona, onions are typically planted in the fall or winter to take advantage of the cooler temperatures.

Planting too early in the season can result in bolting, while planting too late may not allow sufficient time for bulb development. Consult local gardening resources or agricultural extension services for specific planting dates in your area.

Prepare the Soil

Before planting, prepare the soil properly. Onions prefer well-draining soil with good organic matter content. Amend the soil with compost or well-rotted manure to improve its structure and fertility.

Additionally, ensure that the soil pH is within the optimal range for onions, which is typically between 6.0 and 7.0.

Adequate Watering

Onions require consistent moisture, especially during bulb formation. Provide regular and deep watering, ensuring that the soil is moist but not waterlogged.

Use mulch to conserve soil moisture and minimize evaporation. Monitor soil moisture levels closely and adjust watering practices based on the specific needs of your onion plants.

Fertilize Wisely

Apply a balanced fertilizer to provide essential nutrients to your onion plants. However, avoid over-fertilization, as excessive nitrogen can result in excessive foliage growth and smaller bulbs.

Follow recommended application rates and timing, and consider conducting a soil test to determine any nutrient deficiencies or imbalances.

Manage Pests and Diseases

Stay vigilant in managing pests and diseases that commonly affect onions in Arizona. Practice good cultural practices, such as crop rotation, sanitation, and proper spacing, to minimize pest and disease pressure.

Employ integrated pest management (IPM) strategies, including biological controls and organic remedies, as much as possible.

Harvest and Storage

Harvest onions at the right time when the tops have naturally fallen over and the bulbs have reached maturity. Cure the onions in a well-ventilated area to enhance their storage potential. Trim and clean the bulbs before storing them in a cool, dry place with good airflow.

Learn from Experience

Keep a gardening journal to record your observations, successes, and challenges each season. Note the varieties you planted, planting dates, watering and fertilization schedules, and any pest or disease issues you encountered.

This information will help you make informed decisions and improve your onion cultivation techniques over time.

Remember, successful onion cultivation in Arizona requires patience, attention to detail, and adaptation to the unique climate conditions.

By following these tips and adapting them to your specific circumstances, you can enjoy a bountiful onion harvest in the desert landscape of Arizona.

Frequently asked questions

Certainly! Here are some frequently asked questions about growing onions in Arizona:

Can I grow onions in containers in Arizona?

Yes, onions can be grown in containers in Arizona. Choose a container that is at least 10-12 inches deep to accommodate the onion’s root system.

Ensure the container has good drainage and use a well-draining potting mix. Place the container in a sunny location and provide regular watering and fertilization.

How often should I water my onion plants in Arizona?

The frequency of watering will depend on various factors such as temperature, soil type, and stage of growth. Generally, onions require consistent moisture, especially during bulb formation.

Water deeply and regularly, ensuring the soil is evenly moist. Monitor soil moisture levels and adjust watering as needed, taking care not to overwater or let the soil become waterlogged.

How do I prevent onions from bolting in Arizona’s heat?

Bolting, or premature flowering, can be a challenge in Arizona’s hot climate. To prevent bolting, choose onion varieties known for their heat tolerance and short-day or intermediate-day types.

Plant onions at the appropriate time, following the recommended planting dates for your area. Adequate soil preparation, proper watering, and shading the plants during extreme heat can also help minimize bolting.

What are some common pests and diseases that affect onions in Arizona?

Common pests that can affect onions in Arizona include onion thrips, onion maggots, aphids, and cutworms. Diseases such as onion white rot, downy mildew, and pink root can also be problematic.

Implement integrated pest management strategies, practice good sanitation, and monitor plants regularly for signs of infestation or disease to manage these issues effectively.

Can I save onion bulbs from one season to plant in the next year?

Onion bulbs are typically grown as biennials, meaning they complete their life cycle over two years. While it is possible to save onion bulbs for replanting, it’s important to note that onion bulbs tend to decline in quality over time.

Saving bulbs for replanting may result in reduced vigor, disease transmission, or variations in bulb size and flavor. It is generally recommended to purchase fresh onion sets or seeds each year for best results.

How long does it take for onions to mature in Arizona?

The time it takes for onions to mature can vary depending on the variety and environmental conditions. On average, onions in Arizona take approximately 90 to 120 days from planting to maturity.

Monitor the plants for signs of maturity, such as the tops yellowing and falling over, to determine the right time for harvest.

Can I grow onions from seeds in Arizona?

Yes, onions can be grown from seeds in Arizona. Start onion seeds indoors 8-10 weeks before the recommended planting date for your area. Transplant the seedlings outdoors once they have developed several true leaves.


Alternatively, you can also directly sow onion seeds in the garden when the soil temperatures are suitable for germination.

Remember, while these answers provide general guidance, it’s essential to consider specific local conditions and consult local gardening resources or agricultural extension services for region-specific information and recommendations.

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