Collards planting calendar for USDA Zone 6a

Western NC mountains, southern PA, central OH, northern MO. Average last spring frost May 1, first fall frost October 1 — a 153-day frost-free season.

Zone fit: excellent

Collards is well suited to Zone 6a. Standard planting dates work with minor adjustments for microclimates.

Key dates

Start seeds indoors

March 20 – April 3

Direct-seed or transplant outdoors

March 27 – April 17

Expected first harvest

June 2 – June 30

Fall planting window

July 2 – July 23

Fall harvest window

September 7 – October 5

Windows are calculated from your zone's average frost dates. Adjust ±1 week for microclimates, elevation, and your own frost records.

Spacing and soil

Plant spacing: 18″
Row spacing: 24″
Seed depth: 0.5″
Soil temperature: 55–75°F
Frost tolerance: hardy
Days to harvest: 60 days

Grower notes for Zone 6a

Southern staple. Flavor sweetens after two hard frosts — fall crop always beats spring for quality.

Plant near: onions, beets, carrots

Keep away from: tomatoes

Other brassicas for Zone 6a

Same crop, other zones

Track your own plantings

BAU Farm Intelligence turns these windows into per-field tasks — indoor seed-start reminders, transplant dates, harvest projections — using your farm's actual frost history.

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