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Ailsa Craig Onion Seeds - Long-Day Sweet Onion

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The Ailsa Craig Onion, a popular long-day heirloom variety, is known for producing large, sweet onions. These easy-to-grow onions are a favorite among home gardeners for their reliability and delicious results.

  • Prolific and Hardy Plant - Ailsa Craig Onion seeds grow into robust plants known for their generous yields. This variety is renowned for its disease resistance, making it a reliable and resilient choice for home gardens. Suitable for both container and ground gardening.
  • Gourmet Flavor - Ailsa Craig Onions are known for their sweet, mild flavor and large size, making them a popular choice in a variety of culinary applications. Traditionally used in salads, roasts, and other dishes, these onions add a touch of gourmet flavor to your home cooking.

Net Wt. 500MG

Heirloom Vegetable Seeds

All of our seeds are open-pollinated, non-GMO, heirloom varieties with tested germination rates


  • Light
    Full Sun
  • Soil Temp for Germination
    70-85 Degrees F
  • Germination Time
    7-14 Days
  • Planting Depth
    1 Inch
  • Growing Instructions
    Start indoors 8-10 weeks before transplanting outside, or sow directly outside once the ground can be worked. Keep evenly moist until well established. Trim leaves to 3" when transplanting to focus growth in roots. Plant seedlings 2" deep and space 4-6" apart.
  • Seed Saving Instructions
    Onions are biennial, flowering in the second year. In autumn, mulch heavily or replant chosen bulbs in spring. Once flowering heads turn brown, clip and place in a paper bag and dry for several weeks. Separate and store in a cool, dry place.

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Self-Reliance For The Future

  • Sustainable Living - Vegetable gardening is an essential foundation of a more self-sufficient lifestyle. Home-grown fruits and vegetables are generally more flavorful and nutritious than store-bought.
  • Easy to Grow - Seeds are packed in a beautiful paper packet with instructions for successful growing and germination in your own home garden. Each package also has instructions for saving seeds after harvest. Getting started is simple for both beginner and experienced gardeners.
  • Quality Seeds - Plant now or store for future growing seasons. These seeds will remain viable for years if stored in a cool dry location. Our safe, non-hybrid non-GMO heirloom seeds are always open-pollinated, naturally grown, untreated, and selected to ensure the best germination rates

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Frequently Asked Questions

What are heirloom seeds?

Heirloom seeds are the types of seeds your grandparents grew. These varieties have been passed down from generation to generation. They’re old reliable open-pollinated varieties that aren’t typically grown commercially. Instead, they have a rich history that predates modern breeding techniques.

You can learn more about open-pollinated, heirloom, and non-GMO seeds in our Survival Garden Training blog.

Where are Survival Garden Seeds sourced?

The majority of our seeds are sourced in the United States, with a few exceptions when the seed is difficult to source domestically. Whenever we do have to source outside of the US, we ensure our seeds are safe to grow, non-GMO varieties that meet our standards for germination and reliability.

Are your seeds treated?

No, we do not pre-treat our farmer seeds. All of our garden seeds for sale are untreated, open-pollinated, non-GMO, and heirloom varieties. They are kept in temperature-controlled cooler storage until they are packed and shipped to keep them pest and disease-free.

In what zones can I grow your seeds?

The seeds in our collections are specifically chosen from varieties that can be successfully grown from Zone 3 to Zone 10 USDA Hardiness Zones. However, individual varieties have specific needs to thrive in different environments. Each seed pack has optimal temperatures for germination and instructions on seed starting. Consult local frost dates to plan your garden and get the most out of your seeds.

What is the shelf life of these gardening seeds?

Our seeds will generally last for 3-10 years if they are appropriately stored in a cool, dry place. However, we encourage you to grow your survival seeds within a year or two of purchase. This yields the best germination rates possible and also gives you more experience growing survival food now. At the end of the growing season, follow the instructions on the back of each packet for saving seeds for future gardens. These new seeds for survival will be more adapted to thrive in the growing conditions where you are.

1 packet of Ailsa Craig Onion seeds

Ailsa Craig Onion Seeds - Long-Day Sweet Onion

From $3.49

The Ailsa Craig Onion, a popular long-day heirloom variety, is known for producing large, sweet onions. These easy-to-grow onions are a favorite among home gardeners for their reliability and delicious results.

Net Wt. 500MG


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