What to Plant in September — Zone 5
A versatile zone supporting a wide variety of vegetables, herbs, and some fruits with good season extension.
Quick Answer
In zone 5 during September, early fall — cool-season crops return and the last warm-season crops are harvested. Your key tasks this month: harvest tomatoes and peppers before frost, plant garlic and shallots for next summer, and seed cover crops in empty beds.
September Gardening Tasks for Zone 5
September is early fall — cool-season crops return and the last warm-season crops are harvested. Zone 5 has a frost-free window from May 10 – Oct 1, which shapes what you can plant and when. Here is your complete task list:
Plant Guides for This Month
These plants are mentioned in your September tasks. Read their full growing guides for detailed planting instructions:
Tomato
America's most popular garden vegetable, tomatoes come in thousands of varieties…
Garlic
Garlic is the gardener's most patient reward. Planted in autumn and harvested th…
Helpful Guides for September
These gardening guides are especially useful this time of year:
- Seed Starting Indoors — essential if you're starting transplants this month
- Companion Planting Guide — plan your layout for maximum yield
- Organic Pest Control — prepare defenses as the season progresses
- Building Better Soil — start any month to improve next season's harvests
- Pest & Disease Library — identify and solve common garden problems organically
- Browse All Plant Guides — detailed growing instructions for every crop
Frequently Asked Questions
What should I plant in September in zone 5?
In zone 5 during September, focus on: Harvest tomatoes and peppers before frost. Plant garlic and shallots for next summer. Seed cover crops in empty beds. The frost-free period for zone 5 is May 10 – Oct 1.
Is it too late to plant in September in zone 5?
September is a productive month in zone 5. A versatile zone supporting a wide variety of vegetables, herbs, and some fruits with good season extension. Check each crop's days to maturity against your remaining frost-free window (May 10 – Oct 1).
What is USDA zone 5?
USDA Zone 5 has a frost-free growing season from approximately May 10 – Oct 1. A versatile zone supporting a wide variety of vegetables, herbs, and some fruits with good season extension.