When to plant eggplant in zone 3a — planting calendar

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Showing USDA Zone 3A

Growing SeasonZone 3a

Last frost ~May 30First frost ~Sep 10Today

Start indoorsTransplant / sowHarvestFrost risk

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Start indoors Apr 4 · Transplant Jun 20 · First harvest Aug 29 · Wrap by Sep 3

Last spring frostMay 30

Start seeds indoorsApr 4

Transplant outJun 20

First harvestAug 29

Last harvestSep 3

First fall frostSep 10

Why these dates work in zone 3a

Zone 3a's last spring frost averages May 30 and first fall frost Sep 10 — about 103 frost-free days. Eggplant is frost-sensitive, so the 3w after frost timing builds in a safety margin against a late cold snap — setting plants out too early risks losing them to frost. Starting seeds indoors 8 weeks ahead gives strong transplants ready the moment the soil warms.

Common questions

How long does eggplant take to grow in zone 3a?

Eggplant matures in about 70–90 days from transplanting. In zone 3a that means setting plants out around Jun 20 and first picking around Aug 29.

Will eggplant survive frost in zone 3a?

No — eggplant is frost-sensitive. In zone 3a, wait until after the last frost (around May 30) to plant, and harvest before the first fall frost (around Sep 10).

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