Waltham 29 - Organic Broccoli Seeds

Start broccoli seed indoors 5–7 weeks before your anticipated planting date. Optimum soil temperature for seed germination is 70–85°F. Harden off plants for about 1 week before transplanting. Set transplants in the garden 2–4 weeks before your average last spring frost. Direct seeding is best suited to areas with a long, cool spring or for fall crops. For a fall harvest, set transplants about 6–8 weeks before your average first frost, or direct sow about 85–100 days before first frost. Broccoli grows best in cool weather and fertile, well-drained soil with steady moisture. Harvest heads while buds are tight and firm, before flowers begin to open.

Scientific name: brassica oleracea
Days to maturity: 60-90
Seed depth: 1/2"
Days to sprout: 3-10
Plant spacing: 18-24"
Row spacing: 36"
Light requirements: sunny
Plant height: 20"
Life cycle: annual
Frost hardy: yes