Planting guide · zone 9b
When to plant zucchini in zone 9b
In zone 9b, the average last spring frost is Feb 14 and the first fall frost is Dec 12. Here is zucchini's whole year, counted from those dates.
Feb 21Direct sowSpring
Mar 21Succession sowing 2Spring
J
F
M
A
M
J
J
A
S
O
N
D
Soil & site
A rich, composted mound. Zucchini are hungry and fast.
Seedling care
Direct sow 2 seeds per spot and thin to the strongest.
Growing notes
Squash vine borer is the Southern menace — a second sowing 4 weeks later outruns them. Sawdust-like frass at the stem base is the tell.
Harvest
At 6–8 in, checking daily. They genuinely double overnight.
Same crop, other zones
Zucchini in zone 7b →Zucchini in zone 8a →Zucchini in zone 8b →Zucchini in zone 9a →