| CULTURE: Culture of broccoli is similar to cabbage, but broccoli is more sensitive to hot weather. See Cabbage section for detailed cultural notes. In the Mid-Atlantic region transplants should be set out early in the spring, approximately March 15 for coastal areas, April 1 for inland plains, and April 15 for mountainous regions. Transplants should be well developed with several sets of leaves. Most broccoli is tolerant to a low temperature of 10 deg. F (- 12 deg. C) but may "button" when cold injured. A temperature of 40 deg. F (4 deg. C) is required for growth. For fall crops start seed 10 to 12 weeks before the first hard freeze date, and transplant to garden after seedlings are well developed. Broccoli requires a steady supply of moisture in a well- drained fertile soil. Any temporary arrest of growth will adversely affect production and taste. Keep a deep layer of mulch on the soil during hot weather. Side-sprouting varieties have smaller central heads with many side sprouts, a feature that is useful for extended harvest. Plant in raised beds or rows 14 to 16" apart. MATURITY DATES: Days to maturity are from transplanting. Add 25 days if from seed. SEED SAVERS: Broccoli will cross with brussels sprouts, cabbage, cauliflower, kale, and kohlrabi. Isolate by 1/8 mile for home use. For pure seed of small plantings isolate by 1/4 to 1/2 mile. PACKET: Open-pollinated varieties, 2 g (about 625 seeds) sows 50' direct seeded or 350' as transplants. Hybrids, 0.3 g (about 58 seeds). |