Fertile, well-drained soil with plenty of well rotted compost dug in.
Not usually required, but may be needed if plants grow slowly even though the weather is comfortably warm.
Tomato, Garlic, Nasturtium, Thyme, Sage, Onions, Onion, Dill and Agastache.
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.
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.