When to plant broccoli in zone 4

Broccoli in USDA zone 4

Average zone 4 frost dates: last spring frost ≈ May 10, first fall frost ≈ Sep 25 (138 frost-free days). Local dates can vary by 2-3 weeks.

Start indoors 6-8 weeks before transplanting 2 weeks before the last frost; fall crops do very well.

When to plant broccoli in zone 4?

Start seeds indoors: Mar 22 – Apr 5; Transplant outdoors: Apr 26 – May 17; Expected first harvest: from Jul 5; Fall planting: Jul 3 – Jul 17.

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