Home › Crops › Watermelon › Zone 9a
When to plant watermelon in Zone 9a
Your watermelon timeline — Zone 9a
| Start indoors | February 16 – February 23 |
|---|---|
| Transplant | March 9 – March 23 |
| Zone 9a last frost | ~03/02 |
| Zone 9a first frost | ~11/25 |
Dates computed from Zone 9a's median NOAA frost normals and the cited rule. Your town may differ by a week or two — check your exact ZIP.
What you'll need
Affiliate links — as an Amazon Associate we may earn from qualifying purchases, at no extra cost to you.
Seed-starting traysBurpee SuperSeed 36-cell trayReusable cells that pop seedlings out with the roots intact at transplant time.See it on Amazon- Seed-starting mixEspoma Organic Seed StarterA fine, sterile mix so small seeds can push through and seedlings don't rot.See it on Amazon
- Heat matVIVOSUN heat mat with thermostatWarm-season seeds sprout in days instead of weeks when the soil sits near 75–85°F.See it on Amazon
- Grow lightBarrina T5 LED grow lights, 4-packA windowsill is too dim in late winter; a light 2–3 in. above keeps seedlings short and sturdy.See it on Amazon
Ordering seeds or soil for this window? Amazon Prime includes fast delivery on eligible items, and eligible new members may be offered a free trial, so supplies ordered now can arrive while the window is still open. Delivery speed varies by item and address. See if you can try Prime free →
Affiliate link — we may earn a commission on qualifying sign-ups, at no extra cost to you. Current terms are on Amazon's page.
Calendar computed 2026-09-28. Frost: NOAA NCEI 1991–2020. Zone: USDA 2023. Rule: Johnny's Selected Seeds — Seed-Starting Date Calculator chart; University of Georgia Extension — Vegetable Planting Chart (Circular C963) (days to maturity).