Planting guide · zone 8b
When to plant broccoli in zone 8b
In zone 8b, the average last spring frost is Mar 12 and the first fall frost is Nov 22. Here is broccoli's whole year, counted from those dates.
Jan 15Start seeds indoorsSpring
Feb 19Transplant into the gardenSpring
Aug 9Start seeds indoorsFall
Sep 13Transplant into the gardenFall
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F
M
A
M
J
J
A
S
O
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D
Soil & site
Rich, firm, consistently moist soil. Stress at any point risks “buttoning” — tiny premature heads.
Seedling care
Set starts slightly deeper than the pot, up to the first leaves. Water in well and shade for a day if it's hot.
Growing notes
Row cover at transplant blocks cabbage moths. Steady water is non-negotiable for good heads. Rows 24–30 in.
Harvest
Cut the main head while buds are tight, with 5–6 in of stem. Side shoots keep coming for weeks after.