Customer Service Hours
Mon-Fri 8-4 MST
Features
Family
Alliaceae
Native
Exists only in cultivation
Life Cycle
Annual
Plant Height
4" to 6" slightly-flattened bulbs with 6" to 10" tops
Further Information
Growing Conditions
Frost Tolerant
About Walla Walla Bulb Onion Seeds
Allium cepa
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.
Planting Onion
Plant Spacing
A group of 2 seeds every 6"–8"
Light Required
Full sun
Plant Height
4" to 6" slightly-flattened bulbs with 6" to 10" tops
Planting Depth
¼"
Coverage & Planting Details
| Coverage | This packet sows up to 17 feet. |
|---|---|
| Row Spacing | 12"–16" |
| Seed Depth | ¼" |
| Seed Spacing | A group of 2 seeds every 6"–8" |
| Thinning | When 2" tall, thin to 1 every 6"–8" |
| Germination | 7–15 days |
| Start Indoors | 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. |
| Direct Sow | 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. |
| Growing & 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. |
Find Your Frost Date & Grow Zone
Average First Frost Date
October 19
Average Last Frost Date
May 19
Your Hardiness Zone is
5b
Send Your Recommendation
Total 5 star reviews: 12 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 1
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Rating
Which best describes you as a gardener?
13 reviews
- Andrea H.Verified BuyerRated 5 out of 5 stars3/13/26Very Satisfied Customer
I Love baked onions. So happy to have seeds.
Which best describes you as a gardener? IntermediateBIBotanical Interests3/15/26Hey Andrea,
Walla Walla onions are absolutely perfect for baking - they get so sweet and tender when roasted. There's nothing quite like the amazing aroma that fills your kitchen when you're baking fresh homegrown onions! Keep on growing 🌻️
- SylviaRated 5 out of 5 stars3/12/265 Stars
Seeded these and they are coming up already
- Addison y.Verified BuyerRated 5 out of 5 stars3/12/26Honest listing of seeds
Great seeds, great germination. Looking forward to seeing more growth through the growing season
Which best describes you as a gardener? IntermediateBIBotanical Interests3/15/26Hey Addison,
Thank you so much for this fantastic review! We love to hear that our Walla Walla Bulb Onion Seeds are off to such a great start with excellent germination. Keep on growing 🌻️
- Debra L.Verified BuyerRated 5 out of 5 stars3/5/26Growing well
So far seedlings are doing well. Won't really know until I see a harvest.
Which best describes you as a gardener? IntermediateBIBotanical Interests3/6/26Hey Debra,
We're so happy to hear your Walla Walla Bulb Onion seedlings are doing well! You're absolutely right that the real test comes at harvest time, but healthy seedlings are a fantastic start. Thank you for choosing us and for sharing this encouraging update with us. Keep on growing 🌻️
- Lorey B.Verified BuyerRated 5 out of 5 stars11/4/25Onion seeds
Growing quite well.
Which best describes you as a gardener? Intermediate