Broccoli will come to harvest in 55 to 85 days when grown from transplants and 70 to 100 days when grown from seed.
Description. Broccoli is a hardy biennial grown as a cool-season annual. It grows 18 to 36 inches tall and has broad, thick leaves and a thick main stalk. Broccoli forms single or multiple flowers “heads ” of tiny blue-green flower buds. The flowers heads are eaten before they bloom; buds open to tiny yellow flowers. Broccoli will bolt and go to seed in warm temperatures or when daylight hours lengthen.
Yield. Plant 2 to 4 broccoli plants for each household member.
Site. Broccoli grows best in compost-rich, well-drained soil with a soil pH between 6.0 and 6.8. Broccoli grows best where air temperatures range between 45° and 75°F. Broccoli is frost hardy and can tolerate temperatures as low as 20°F. In regions where there is heavy rain or sandy soil, aged-compost should be added to the soil to supplement soil nitrogen.