Skip to product information
1 of 3

Botanical Interests

Walla Walla Bulb Onion Seeds

Walla Walla Bulb Onion Seeds

Regular price $3.49
Sale price $3.49 Regular price
~0.5 g (~100 seeds)
Sale Sold out

Free shipping on orders over $79

Product Details

Famous for it's juicy sweetness, 'Walla Walla' onion seeds traveled from the coast of Italy to Walla Walla, Washington. One of the best onions to enjoy fresh! Long-day onion, but can be grown as an intermediate-day onion because it matures early. High yield and enormous bulbs, make sure to use shortly after harvest.

View full details

Your hardiness zone is

  • Variety Info
  • Sowing Info
  • Growing Info

Variety Info

Days to Maturity: 100–125 days

Family: Alliaceae

Type: Long-day sweet onion. (Learn more)

Native: Exists only in cultivation

Hardiness: Biennial grown as an annual

Exposure: Full sun

Plant Dimensions: 4" to 6" slightly-flattened bulbs with 6" to 10" tops

Variety Info: Yellow, slightly flattened, globe onion, 4"–6" in diameter and weighing around 2 lbs. with dry, papery skin and 6"–10" tops. 'Walla Walla' is a bulbing, yellow, long-day, sweet onion with a short storage period.

Attributes: Frost Tolerant

Sowing Info

When to Sow Outside: 4 to 6 weeks before your average last frost date, or as soon as soil can be worked; when soil temperature is at least 45°F.

When to Start Inside: RECOMMENDED. 10 to 12 weeks before your average last frost date. Transplant outdoors 4 to 6 weeks before your average last frost date. The earlier the start, the bigger the bulb. Ideal soil temperature is 60°–85°F.

Days to Emerge: 7–15 days

Seed Depth: ¼"

Seed Spacing: A group of 2 seeds every 6"–8"

Row Spacing: 12"–16"

Thinning: When 2" tall, thin to 1 every 6"–8"

Growing Info

Harvesting: When onion tops have fallen over and turned yellow or brown, they are ready for harvest. Harvest in the morning, lifting onions with a garden fork. Dry them in the garden in the sun for 2 to 3 days, lightly covering the bulbs with straw, or the tops of other onions to prevent sunscald. Cure onions for 3 to 7 days in a dry area with good air circulation. Once dry, cut the roots to 1/4", and the greens to 1" to create a seal, preventing decay.

4.5
Rated 4.5 out of 5 stars
Based on 8 reviews
Total 5 star reviews: 7 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 1
Rating
Ratings
Which best describes you as a gardener?
Which best describes you as a gardener?
Who do you grow for?
Who do you grow for?
How do you prefer to grow?
How do you prefer to grow?
8 reviews
  • Lex ..
    Verified Buyer
    Rated 5 out of 5 stars
    Mar 23, 2025
    5 Stars

    Great germination rate, almost 100%! The onion seedlings look very healthy. I used Fort Vee seedling mix, and am trimming the seedlings for better growth. I’m happy with these!

  • Clay C.
    Verified Buyer
    Rated 1 out of 5 stars
    Jun 12, 2024
    1 Star

    Onions did not propagate well at all. I didn’t have any to plant

    Which best describes you as a gardener? Intermediate
    EG Profile picture for Epic Gardening
    Epic Gardening
    Jun 13, 2024

    Hey Clay,

    I sincerely appreciate you taking the time to share your thoughts in a review. I've reached out to you via email to offer assistance and address any concerns you may have. Your feedback is invaluable to us, and we are committed to ensuring your experience is positive. Thank you once again for your input. Keep on growing 🌻️

  • Norman D.
    Verified Buyer
    Rated 5 out of 5 stars
    May 1, 2024
    5 Stars

    So what does matter to a home gardener when choosing a catalogue from which to order seeds? For me it is knowing that my order will be processed and shipped el pronto quicko. It is knowing that the germination rate of the seed I have ordered approaches 80% or higher. It is knowing that they are not about selling odd ball novelty varieties but about providing rock solid varieties with proven performance. They almost always have whatever I am looking for. Botanical Interests has been my go to resource for seeds for 3 years and they have never disappointed.

    Which best describes you as a gardener? Expert
  • Karol j.
    Verified Buyer
    Rated 5 out of 5 stars
    Feb 18, 2024
    5 Stars

    My videos are too long to upload but o my gosh yall get your hands on theses seeds!! IVE NEVER seen any other company who puts a picture of how the sprouts look for each individual seed packet it’s great because you can tell the difference between weeds and the sprouts ! GENIUSES! 🙌🏼🫶 excited to buy more seeds !

  • Kathy A.
    Verified Buyer
    Rated 5 out of 5 stars
    Feb 14, 2024
    5 Stars

    Haven't planted yet.

    Which best describes you as a gardener? Intermediate