When to plant nasturtium in zone 8a — planting calendar

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Showing USDA Zone 8A

Growing SeasonZone 8a

Last frost ~Mar 25First frost ~Nov 10Today

Start indoorsTransplant / sowHarvestFrost risk

MARAPRMAYJUNJULAUG

Sow Apr 1 · First harvest May 21 · Wrap by Aug 13

Last spring frostMar 25

Direct sowApr 1

First harvestMay 21

Last harvestAug 13

First fall frostNov 10

Why these dates work in zone 8a

Zone 8a's last spring frost averages Mar 25 and first fall frost Nov 10 — about 230 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 8a?

Nasturtium matures in about 50–70 days from sowing. In zone 8a that means sowing around Apr 1 and first picking around May 21.

Will nasturtium survive frost in zone 8a?

No — nasturtium is frost-sensitive. In zone 8a, wait until after the last frost (around Mar 25) to plant, and harvest before the first fall frost (around Nov 10).

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