Walla Walla White · Onion
Planting Schedule
Add Walla Walla White to your garden to build a schedule and get reminders.
| Milestone | Date |
|---|---|
| Start Indoors | Mar 18th |
| Last Frost | May 13th |
| Transplant / Direct Sow Outdoors | May 13th |
| Harvest Begins | Aug 11th |
| Harvest Ends | Sep 27th |
Crop Details
Transplant Conditions:
Wait until soil reaches 45°F
and nights stay above 28°F
before moving outdoors.
Harden off for 7 days first.
| Trait | Value |
|---|---|
| Days to Maturity | 90 |
| Sun Requirements | Full Sun |
| Growth Habit | Bulbing |
| Support Needed | None |
| Planting Depth | Normal |
| Germination Temp (°F) | 55 |
| Min Soil Temp (°F) | 45 |
| Min Night Temp (°F) | 28 |
| Harden Off (days) | 7 |
Expert Note: Start for sweet-spot mild onions: transplant on warm, weed-free beds once nights are reliably above 40–45°F to keep bulbs sweet and crisp.