When to Plant Onions in West Virginia
The backbone of the kitchen garden. Choose short-day, intermediate, or long-day varieties based on your latitude.
The Short Answer
West Virginia Frost Dates
Your planting dates depend on which part of West Virginia you're in. Here are the frost date ranges by region:
| Region | Zones | Last Frost (Spring) | First Frost (Fall) |
|---|---|---|---|
| Eastern Panhandle | 6a, 6b | Apr 20 - May 5 | Oct 5 - Oct 20 |
| Central Mountains | 5a, 5b, 6a | May 1 - May 20 | Sep 20 - Oct 10 |
| Southern Valleys | 6b, 7a | Apr 10 - Apr 25 | Oct 15 - Nov 1 |
Onions Planting Schedule for West Virginia
Eastern Panhandle (Zones 6a, 6b)
Average last frost: Apr 20 - May 5 · Average first frost: Oct 5 - Oct 20
Central Mountains (Zones 5a, 5b, 6a)
Average last frost: May 1 - May 20 · Average first frost: Sep 20 - Oct 10
Southern Valleys (Zones 6b, 7a)
Average last frost: Apr 10 - Apr 25 · Average first frost: Oct 15 - Nov 1
Growing Onions in West Virginia
Onions in West Virginia's Climate
Long-day onions are your type. Plant sets or transplants as soon as ground can be worked in spring. For the largest bulbs, start from seed indoors 10-12 weeks before last frost. Your June day length (15+ hours) triggers proper bulbing. Cure in a warm, dry location for 2-3 weeks before storage.
Soil Considerations for West Virginia
Shale and sandstone soils. Acidic throughout. Thin mountain soils. Valleys have better soil depth. Raised beds often recommended. Loose, well-drained soil is especially important for onions since the edible portion grows underground. If your soil is heavy clay, consider raised beds.
West Virginia Climate & Growing Season
Mountain climate with significant elevation variation. Cooler summers at altitude. Good rainfall. Microclimates in valleys. Onions can handle frost well, which is an advantage in West Virginia's climate. You can push planting dates earlier in spring and extend into fall.
Growing season length varies across West Virginia: Eastern Panhandle (6a, 6b) has a last frost around Apr 20 - May 5, while Southern Valleys (6b, 7a) sees frost end around Apr 10 - Apr 25. This difference matters for onions — but onions handle frost well, so the timing difference is less critical.
Growing Tips
Day length triggers bulbing. Northern gardeners need long-day varieties. Southern gardeners need short-day varieties.
Companion Planting
Plant onions alongside these companions for better growth:
Keep onions away from:
The Bottom Line
Last reviewed: March 29, 2026