When to plant nasturtium in zone 10a — planting calendar

Not your zone?

Showing USDA Zone 10A

Growing SeasonZone 10a

Last frost ~Jan 31First frost ~Dec 15Today

Start indoorsTransplant / sowHarvestFrost risk

JANFEBMARAPRMAYJUNJUL

Sow Feb 7 · First harvest Mar 29 · Wrap by Jun 21

Last spring frostJan 31

Direct sowFeb 7

First harvestMar 29

Last harvestJun 21

First fall frostDec 15

Why these dates work in zone 10a

Zone 10a's last spring frost averages Jan 31 and first fall frost Dec 15 — about 318 frost-free days. Nasturtium is frost-sensitive, so the 1w after frost timing builds in a safety margin against a late cold snap — setting plants out too early risks losing them to frost.

Common questions

How long does nasturtium take to grow in zone 10a?

Nasturtium matures in about 50–70 days from sowing. In zone 10a that means sowing around Feb 7 and first picking around Mar 29.

Will nasturtium survive frost in zone 10a?

No — nasturtium is frost-sensitive. In zone 10a, wait until after the last frost (around Jan 31) to plant, and harvest before the first fall frost (around Dec 15).

For soil, spacing, pests and companion planting, see the full nasturtium growing guide →