What to Plant in March — 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 March, early spring — soil preparation begins, cool-season crops go outside, and indoor seedlings need attention. Your key tasks this month: start tomatoes, broccoli, and herbs indoors, direct sow peas and spinach as soon as soil can be worked, and begin hardening off early brassica transplants.
March Gardening Tasks for Zone 5
March is early spring — soil preparation begins, cool-season crops go outside, and indoor seedlings need attention. 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 March tasks. Read their full growing guides for detailed planting instructions:
Tomato
America's most popular garden vegetable, tomatoes come in thousands of varieties…
Spinach
Spinach is a cool-weather superstar packed with iron and vitamins. It grows quic…
Broccoli
Homegrown broccoli has a depth of flavor that supermarket heads simply can't mat…
Helpful Guides for March
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 March in zone 5?
In zone 5 during March, focus on: Start tomatoes, broccoli, and herbs indoors. Direct sow peas and spinach as soon as soil can be worked. Begin hardening off early brassica transplants. The frost-free period for zone 5 is May 10 – Oct 1.
Is it too late to plant in March in zone 5?
March 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.