When to plant tomato in zone 6b — planting calendar

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Showing USDA Zone 6B

Growing SeasonZone 6b

Last frost ~Apr 20First frost ~Oct 15Today

Start indoorsTransplant / sowHarvestFrost risk

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Start indoors Mar 9 · Transplant May 4 · First harvest Jul 3 · Wrap by Sep 11

Last spring frostApr 20

Start seeds indoorsMar 9

Transplant outMay 4

First harvestJul 3

Last harvestSep 11

First fall frostOct 15

Why these dates work in zone 6b

Zone 6b's last spring frost averages Apr 20 and first fall frost Oct 15 — about 178 frost-free days. Tomato is frost-sensitive, so the 2w 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 6 weeks ahead gives strong transplants ready the moment the soil warms.

Common questions

How long does tomato take to grow in zone 6b?

Tomato matures in about 60–85 days from transplanting. In zone 6b that means setting plants out around May 4 and first picking around Jul 3.

Will tomato survive frost in zone 6b?

No — tomato is frost-sensitive. In zone 6b, wait until after the last frost (around Apr 20) to plant, and harvest before the first fall frost (around Oct 15).

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