Broccoli Growing Information Brassica oleracea Transplant:Sow in trays at 1/4” depth, 3-4 weeks before desired transplant date. Can be started spring through mid-summer or all year round in milder climates. Soil temperature for germination is 55-75° F. Spacing: 12-18" apart in rows that are 18-36" apart. Growth needs:Grows best in well-drained soil that is high in organic matter. Irrigate regularly and add nutrients for best yield. Broccoli is a cool-weather crop that does not tolerate high heat well. Be sure to choose appropriate varieties for the temperature and season. Harvest:When crowns are of desired size and while beads are still tight. Storage:Store at 32° F with 95% relative humidity for 10-12 days. Icing immediately after harvest can help prolong shelf life.