Calabrese Broccoli
How to Grow Calabrese Broccoli
Overview
Calabrese Broccoli (Brassica oleracea), also known as green broccoli, is a cool-season vegetable that is widely cultivated for its nutritious and flavorful heads. This variety of broccoli is prized for its high yield of side shoots, which continue to produce even after the main head has been harvested.
Growing Conditions
Calabrese Broccoli thrives in full sun and well-drained soil with a pH level between 6.0 and 7.0. It prefers cool temperatures, so planting should take place in early spring or late summer when daytime temperatures are consistently below 75°F (24°C).
Planting & Care
Sow seeds directly into the garden bed, about 1/2 inch deep and 1-2 inches apart, after the last frost date. Thin seedlings to a spacing of 18-24 inches once they reach 3-4 inches in height. Keep the soil moist but not waterlogged, as overly wet conditions can lead to root rot.
Common Problems
Watch for signs of pests like aphids and caterpillars, which can be controlled with organic insecticides or handpicking. Broccoli is also susceptible to fungal diseases such as powdery mildew and downy mildew, which respond well to proper air circulation and the application of fungicidal sprays.
Harvest or Enjoy
Harvest the main head when it's tightly closed and brightly colored, typically 50-60 days after planting. Once the central stalk has been removed, side shoots will continue to develop for several weeks if temperatures remain cool. Pick these smaller heads as soon as they're large enough to use, as they'll quickly become tough and inedible if left on the plant too long.