When to plant sunflower in zone 7b — planting calendar

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Showing USDA Zone 7B

Growing SeasonZone 7b

Last frost ~Apr 5First frost ~Nov 1Today

Start indoorsTransplant / sowHarvestFrost risk

MARAPRMAYJUNJUL

Sow Apr 5 · First harvest Jun 4 · Wrap by Jul 2

Last spring frostApr 5

Direct sowApr 5

First harvestJun 4

Last harvestJul 2

First fall frostNov 1

Why these dates work in zone 7b

Zone 7b's last spring frost averages Apr 5 and first fall frost Nov 1 — about 210 frost-free days. Sunflower is frost-sensitive, so the around last 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 sunflower take to grow in zone 7b?

Sunflower matures in about 60–100 days from sowing. In zone 7b that means sowing around Apr 5 and first picking around Jun 4.

Will sunflower survive frost in zone 7b?

No — sunflower is frost-sensitive. In zone 7b, wait until after the last frost (around Apr 5) to plant, and harvest before the first fall frost (around Nov 1).

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