🥬 When to Plant Collard Greens

When should I plant collard greens?

Plant collard greens outdoors 6 weeks before last frost. For a head start, start seeds indoors 4 weeks before your area's last frost date. Transplants can go out 4 weeks before last frost.

Is collard greens frost sensitive?

Collard Greens can tolerate light frost, surviving temperatures as low as 20°F. This makes it a great candidate for early spring or fall planting when other crops can't go out yet.

What temperature does collard greens need?

Collard Greens grows best between 40°F and 70°F. It can survive down to 20°F, but growth slows significantly below 40°F. It prefers cool weather and may bolt or stop producing if summer heat arrives early.

How long does collard greens take to grow?

Collard Greens typically takes 60–75 days from transplant (or direct sow) to first harvest.

Should I start collard greens seeds indoors?

Yes — start collard greens seeds indoors 4 weeks before your area's last expected frost date. This gives seedlings time to develop strong roots before outdoor conditions are ready.

Is it too cold to plant collard greens?

It is too cold to plant Collard Greens outdoors when nighttime temperatures are falling below 20°F. While Collard Greens can tolerate temperatures as low as 20°F, growth will be slow until nights consistently exceed 40°F. Use CanIPlant to check your local 7-day forecast and get a real-time answer for your ZIP code.

Is it too hot to plant collard greens?

Collard Greens starts to struggle when temperatures climb above 70°F. As a cool-season crop, Collard Greens is especially heat-sensitive — high temperatures cause bolting, bitter flavor, or complete crop failure. Avoid planting in the peak of summer and opt for spring or fall instead. CanIPlant checks your local forecast highs to flag this automatically.

Any tips for growing collard greens?

Very cold hardy. Frost sweetens flavor.