Kale and collards grow as biennials in areas with mild winters and may come back as perennials (a life cycle longer than two years) in colder climates. These cold tolerant greens will continue to grow and produce new leaves to harvest and cook, even after they have frozen. They get even sweeter after the first fall frosts.
Sowing: Sow 3-4 seeds 5mm (¼‘’) deep, spaced 45-60cm (18-24’’) apart in rows 75-90cm (30-36’’) apart. Thin to the strongest plant and add lime to the bed 3 weeks prior to sowing.
Soil: Ideal pH is 6.0 – 6.8. Mix ¼ cup of complete fertilizer into the soil beneath each transplant.
Growing: Kale likes well-drained, fertile soil and collards prefers plentiful, consistent moisture. Seeds should germinate in 7-10 days.
Harvesting: When plants are 5-8cm (2-3’’) tall, kale and collards can be cut and will re-grow.
Pests and Disease: A floating row cover (a thin, transparent, and flexible sheeting) can protect from cabbage moths and other insect pests. Avoid planting Brassicas in the same spot more than once every four years.
Companion Planting: All Brassicas benefit from chamomile, dill, mint, rosemary, and sage.
Both Brassicas are exceptionally rich in vitamins A, C and K, along with beta-carotene, iron, calcium, and potassium. They are perfect for juicing and to have as a crunchy salad.
For tips on growing other vegetables in your garden in August, read the article Start Sowing these Seeds this August.