What to Plant in September in Zone 9

14 crops you can start in zone 9a & 9b during September. The dates are worked out from zone 9's typical frosts: last spring frost around Feb 15, first fall frost around Dec 5. Each crop links to its full dates for zone 9.

Start indoors in September

Seeds to start under lights or on a sunny sill this month. Dates are the indoor-start window for zone 9.

SnapdragonAug–DecFall

Sow or plant outside in September

What goes in the ground this month, either as seed or as a transplant. Dates are the planting-out window for zone 9.

Vegetables & herbs

BeetDirect sowSep 27–Oct 11Fall
BroccoliTransplantSep 17–Oct 1Fall
Bush BeansDirect sowSep 27–Oct 11Fall
CabbageTransplantSep 12–Sep 26Fall
CarrotDirect sowSep 12–Sep 26Fall
CauliflowerTransplantSep 12–Sep 26Fall
Collard GreensSow or transplantSep 12–Sep 26Fall
KaleSow or transplantSep 22–Oct 6Fall
KohlrabiSow or transplantSep 27–Oct 11Fall
Napa Cabbage (Chinese Cabbage)Sow or transplantSep 25–Oct 9Fall
PeaDirect sowSep 22–Oct 6Fall
Swiss ChardSow or transplantSep 27–Oct 11Fall

Flowers

Daffodil (Narcissus)Plant bulbsSep–NovFall

← August in zone 9 · October in zone 9 →

Keep planning

Growing guides

Plan your bed

Not sure of your zone? Look it up by ZIP code.

September in other zones: zone 4, zone 5, zone 6, zone 7, zone 8, zone 10, zone 11

Worth having in September

Agfabric 0.55oz Floating Row CoverLight enough to leave on through a cold night when a frost threatens early or late plantings.Check price on Amazon →Nisaku NJP650 Hori-Hori Weeding KnifeDepth markings on the blade for planting bulbs and garlic at the right depth.Check price on Amazon →FCMP Outdoor IM4000 Dual Chamber Tumbling ComposterTwo chambers, so one batch finishes while you add fall leaves and scraps to the other.Check price on Amazon →

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What to plant in September in zone 9: bush beans, pea, carrot, kale and more

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What to plant in September in zone 9: 14 crops to start indoors or plant outside, including bush beans, pea, carrot, kale, with exact dates for zone 9a and 9b.

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