What to Plant in September

USDA Zone 3b

Last frost: May 15 – Jun 1 Frost-free days: 90–120

The first frost is approaching. Finish up fall plantings and protect tender crops. Garlic goes in the ground this month or next. Harvest and preserve summer bounty.

No crops are typically planted in September for Zone 3b.

Try checking adjacent months or a warmer zone.

September Gardening Tips

  • Protect tender crops from early frost with row cover — this can extend your season by several weeks.

Related Guides

Square foot gardening spacing chart

Spacing Chart

How many plants per square foot

 4x8 raised bed garden layout

4×8 Raised Bed Layout

Planting plans for a standard bed

 Planting calendar by zone

Planting Calendar

When to plant for your zone

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