Here is the information for a 100 foot row of BROCCOLI Approximate yield is 100 lbs. at a spacing of 18-24 inches between plants. You will need between 1/8 and 1/4 ounces of seeds. Fertilizer rates : ::Manure (approximate): 120 lbs. ::Chemical (10-10-10): 5 cups. BROCCOLI typically grow to a height of 18-24 inches. This crop does well in a soil that is rich & loose with lots of humus and a little extra lime and with a pH range of 6.0-7.5. Pick a spot that provides full sun. Growing seasons: Spring: yes Summer: no Fall: yes Winter: no From seed to first harvest is nominally 16 weeks. Seeds can be started indoors as early in the spring as 12 weeks before your growing areas last spring frost and then transplanted into the garden in about 7 weeks. From transplant time to the first harvest is usually about 9 weeks with around 3 weeks of harvesting. For the fall planting cycle, seeds should be started no later than 16 weeks ahead of your first fall frost.