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Broccoli

Use our zone-based planting guide to know when to plant broccoli.

Broccoli
Plant name Zone Start seeds indoors Start seeds outdoors Plant seedlings/transplants outdoors Plant spacing # plants per person
Broccoli 3a March 15-April 1 April 23-May 1 April 15-May 1; June 1-15 18 inches 3-5
Broccoli 3b March 15-April 1 April 23-May 1 April 15-May 1; June 1-15 18 inches 3-5
Broccoli 4a March 15-April 1 April 23-May 1 April 15-May 1; June 1-15 18 inches 3-5
Broccoli 4b March 15-April 1 April 23-May 1 April 15-May 1; June 1-15 18 inches 3-5
Broccoli 5a Feb. 15-March 1 March 23-April 1 March 15-April 1; July 1-15 18 inches 3-5
Broccoli 5b Feb. 15-March 1 March 23-April 1 March 15-April 1; July 1-15 18 inches 3-5
Broccoli 6a Feb. 15-March 1 March 23-April 1 March 15-April 1; July 1-15 18 inches 3-5
Broccoli 6b Feb. 15-March 1 March 23-April 1 March 15-April 1; July 1-15 18 inches 3-5
Broccoli 7a Feb. 15-March 1 March 23-April 1 March 15-April 1; July 1-15 18 inches 3-5
Broccoli 7b Feb. 15-March 1 March 23-April 1 March 15-April 1; July 1-15 18 inches 3-5
Broccoli 8a Jan. 15-Feb. 1 Feb. 23-March 1 Feb. 15-March 1; Aug. 1-15 18 inches 3-5
Broccoli 8b Jan. 15-Feb. 1 Feb. 23-March 1 Feb. 15-March 1; Aug. 1-15 18 inches 3-5
Broccoli 9a Dec. 15-Jan. 1 Nov. 23-Dec. 1 Nov. 15-Dec. 1; Aug. 1-15 18 inches 3-5
Broccoli 9b Dec. 15-Jan. 1 Nov. 23-Dec. 1 Nov. 15-Dec. 1; Aug. 1-15 18 inches 3-5
Broccoli 10a Nov. 30-Dec. 15 Jan 7-21 Nov. 1-15; Aug. 1-15 18 inches 3-5
Broccoli 10b Nov. 30-Dec. 15 Jan 7-21 Nov. 1-15; Aug. 1-15 18 inches 3-5
Broccoli 11a 6-8 weeks before planting outside Feb. 1-April 1 February-April; October-December 18 inches 3-5
Broccoli 11b 6-8 weeks before planting outside Feb. 1-April 1 February-April; October-December 18 inches 3-5

* Start seeds indoors 6-8 weeks before last frost date. Transplant outside 4-6 weeks later. Direct sow 2-3 weeks before last frost date. Direct sow in mid-summer for fall harvest.