Planting guide · zone 5a
When to plant zucchini in zone 5a
In zone 5a, the average last spring frost is May 15 and the first fall frost is Oct 1. Here is zucchini's whole year, counted from those dates.
May 22Direct sowSpring
Jun 19Succession 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 5b →Zucchini in zone 6a →Zucchini in zone 6b →Zucchini in zone 7a →