Collards Growing Guide

Brassica oleracea var. viridis


Crop Rotation Group

Brassicas (Cabbage family) 


Fertile, well-drained soil with plenty of well rotted compost dug in.


Full sun.

Frost tolerant



Not usually required, but may be needed if plants grow slowly even though the weather is comfortably warm.


Single Plants: 11" (30cm) each way (minimum)
Rows: 11" (30cm) with 1' 3" (40cm) row gap (minimum)

Sow and Plant

Sow indoors in spring and set out under cloches when plants have 5 leaves. Start another planting indoors in midsummer, and set out in early fall.
Our Garden Planner can produce a personalised calendar of when to sow, plant and harvest for your area.


The flavor of collards is improved by cool temperatures, so fall is the preferred time to grow this crop.


Harvest leaves individually, when they are about the size of your hand.


In warm weather, cabbageworms may feed on leaves. Exclude them with floating row covers. In cool weather, watch for outbreaks of gray-green cabbage aphids in leaf crevices. Pick off and compost badly infested leaves.

Planting and Harvesting Calendar

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Pests which Affect Collards