Home › When to plant › Onions › Zone 4
When to plant onions in zone 4
Advertisement
Onions in USDA zone 4
| Step | Dates |
|---|---|
| Start seeds indoors | Mar 1 – Mar 15 |
| Transplant outdoors | Apr 12 – May 3 |
| Expected first harvest | from Jul 21 |
Average zone 4 frost dates: last spring frost ≈ May 10, first fall frost ≈ Sep 25 (138 frost-free days). Local dates can vary by 2-3 weeks.
Plant sets or transplants 2-4 weeks before the last frost; pick long-day varieties in the north, short-day in the south.
FAQ
When to plant onions in zone 4?
Start seeds indoors: Mar 1 – Mar 15; Transplant outdoors: Apr 12 – May 3; Expected first harvest: from Jul 21.
Other zones
Advertisement
Free calculator by FrostWise