🥬 Can I Plant Collard Greens in Madison, WI?

2026 planting guide for Zone 5a · Last frost ~May 7 · Growing season ~153 days

✅ YES — Good time to plant for a fall harvest

Collard Greens thrives in cool weather and can be planted now for a fall harvest. Sow seeds soon — they'll be ready around Sep 28–Oct 13, well before the average first frost around Nov 14.

Planting window: Jul 30 – Aug 13
Sow collard greens seeds directly now for a fall harvest. Expect to harvest around Sep 28.
Live result based on current forecast for Madison, WI · Updates every 6 hours
USDA Zone
5a
Last Spring Frost
~May 7
First Fall Frost
October 7
Growing Season
~153 days
Ideal Temp for Collard Greens
40–70°F
Frost Risk
✅ Tolerant

Growing Collard Greens in Madison

Madison's Zone 5a climate between two lakes gives it roughly 152 frost-free days. The lakes Mendota and Monona slightly moderate temperatures, but late spring frosts remain a real risk into early May. The local university culture has fueled a strong gardening and sustainable agriculture community. Start warm-season crops indoors in late March, use row covers, and embrace cold-hardy varieties to make the most of Madison's short but rewarding season.

In Madison (last frost around May 7), collard greens can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity. Starting seeds indoors 4 weeks before the last frost date gives you a significant head start.

Collard Greens thrives between 40°F and 70°F. It tolerates temperatures as low as 20°F, making it a candidate for early spring planting before the last frost date. Expect 60–75 days from transplant to first harvest. Very cold hardy. Frost sweetens flavor.

Frequently Asked Questions

When can I plant collard greens in Madison, WI?

In Madison (last frost around May 7), collard greens can go out around March — approximately 6 weeks before the last expected frost, making it an early-season opportunity. For best results, start seeds indoors 4 weeks before that — giving you strong transplants ready to go out at the right time.

What is the USDA hardiness zone for Madison?

Madison, WI is in USDA Plant Hardiness Zone 5a. The last expected spring frost is around May 7, and the first fall frost arrives around October 7. This zone classification helps you understand which perennials survive winter and when annual vegetables can safely go outdoors.

Is it safe to plant collard greens outside in Madison right now?

That depends on the current weather forecast. Collard Greens needs temperatures above 20°F (ideally 40–70°F) to thrive. CanIPlant checks your real 7-day forecast and any active frost alerts to give you a live YES, NO, or WAIT answer — just enter your ZIP code.

Can I grow collard greens in Madison 2026?

Yes — Collard Greens grows well in Madison, WI. With a Zone 5a climate and a growing season of ~153 days, Madison is well-suited for cool-season crops like collard greens. As a frost-tolerant crop, collard greens can even go out a few weeks before the last frost date.

Grow Collard Greens in Other Cities

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