Success with Seeds Broccoli

Broccoli Germination Information

Broccoli Seed Germination How to Sow Broccoli:
  • Broccoli is a cool season crop that is grown in early spring or the fall
  • Sow seeds indoors, 7-9 weeks before last frost, at 70-75°
  • Expect germination in 10-14 days
  • Seeds can also be sown indoors at 68-72°
  • Alternatively, sow seed outdoors two weeks before last frost, when the soil is still cool
  • In Zone 8 and warmer, sow seeds in early fall for a late fall or winter crop
  • Expect germination in 10-14 days. It is 45-60 days from sowing to harvesting
  • When sowing seed outdoors, we recommend a maximum planting depth of 4X the width of the seed

How to Grow Broccoli:
Transplanting: Transplant when there are at least two sets of true leaves

Spacing: Space 18-24 inches apart in rows 21/2- 3 feet apart

Lighting: Site in full sun

Soil: Site in a rich, moist, well-drained soil. Feed with a low nitrogen fertilizer. Do so when first planting out, when plants are 6-8 inches tall, 12-15 inches tall, and again when the buds first form

Additional Care: Keep well watered and mulch the plants to keep the ground cool and moist

Appearance and Use:

Broccoli is grown as an annual, but is really a biennial. It grows 2 feet tall by 12-18 inches wide. The flower buds (“heads”), stems, and upper leaves are eaten fresh (but also freeze well). Harvest the 6-12 inch diameter heads of flower buds before they open, when they are still tight and dark green. Cut the stem 6 inches below the tree-like clusters. Side branches will continue to produce for another 2-3 months. Soak the heads for 30 minutes to float out any worms

About Broccoli:
Botanical name: Brassica oleracea Italica Group
Pronunciation:  bras’i-kå o-ler-a’-se-å
Lifecycle:  Annual
Origination: Brassicaceae; native to coastal Europe