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When to plant Broccoli in Zone 1a

In Zone 1a, Broccoli: start seeds indoors around Apr 27–May 11; transplant outdoors around Jun 1–Jun 15; direct sow outdoors around May 9–May 30. Expect to harvest around Jul 13–Aug 3.

StepWhen
Start seeds indoorsApr 27 – May 11
Transplant outdoorsJun 1 – Jun 15
Direct sow outdoorsMay 9 – May 30
HarvestJul 13 – Aug 3
HarvestAug 5 – Aug 19

Tip: A cool-season brassica. Transplant in early spring or late summer; it bolts in midsummer heat.

Zone 1a averages a last spring frost around Jun 15 and a first fall frost around Aug 15. These are zone averages — look up your ZIP for your exact area.

See the full Zone 1a calendar in the tool →

Other vegetables in Zone 1a

Broccoli in nearby zones