When to Plant Zinnias in West Virginia
The cut-and-come-again champion. The more you cut zinnias, the more they bloom. A cottage garden essential.
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 |
Zinnias 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 Zinnias in West Virginia
Zinnias in West Virginia's Climate
Your warm, humid summers grow zinnias prolifically. Direct sow from mid-May. Powdery mildew is the main issue in humid conditions — water at the base, never overhead, and choose mildew-resistant varieties. Cut or deadhead regularly for continuous bloom through frost.
Soil Considerations for West Virginia
Shale and sandstone soils. Acidic throughout. Thin mountain soils. Valleys have better soil depth. Raised beds often recommended. Make sure soil has warmed to at least 60°F before planting zinnias outside.
West Virginia Climate & Growing Season
Mountain climate with significant elevation variation. Cooler summers at altitude. Good rainfall. Microclimates in valleys. Zinnias cannot tolerate any frost, so wait until all frost danger has passed before transplanting outside. Watch local forecasts carefully in spring.
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 zinnias — transplant timing shifts by several weeks across the state.
Growing Tips
Water at the base to prevent powdery mildew. Cut flowers just above a leaf node to encourage more branching and blooms.
Companion Planting
Plant zinnias alongside these companions for better growth:
The Bottom Line
Last reviewed: March 29, 2026