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Cauliflower

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

Plant name Zone Start seeds indoors Start seeds outdoors Plant seedlings/transplants outdoors Plant spacing # plants per person
Cauliflower 3a April 15-May 1; July 15-Aug. 1 April 15-May 1; July 15-Aug. 1 April 15-May 1; July 15-Aug. 1 18-24 inches 3-5
Cauliflower 3b April 15-May 1; July 15-Aug. 1 April 15-May 1; July 15-Aug. 1 April 15-May 1; July 15-Aug. 1 18-24 inches 3-5
Cauliflower 4a April 15-May 1; July 15-Aug. 1 April 15-May 1; July 15-Aug. 1 April 15-May 1; July 15-Aug. 1 18-24 inches 3-5
Cauliflower 4b April 15-May 1; July 15-Aug. 1 April 15-May 1; July 15-Aug. 1 April 15-May 1; July 15-Aug. 1 18-24 inches 3-5
Cauliflower 5a March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 18-24 inches 3-5
Cauliflower 5b March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 18-24 inches 3-5
Cauliflower 6a March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 18-24 inches 3-5
Cauliflower 6b March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 18-24 inches 3-5
Cauliflower 7a March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 18-24 inches 3-5
Cauliflower 7b March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 March 15-April 1; Aug. 15-Sept. 1 18-24 inches 3-5
Cauliflower 8a Feb. 15-March 1; Sept. 15-Oct. 1 Feb. 15-March 1; Sept. 15-Oct. 1 Feb. 15-March 1; Sept. 15-Oct. 1 18-24 inches 3-5
Cauliflower 8b Feb. 15-March 1; Sept. 15-Oct. 1 Feb. 15-March 1; Sept. 15-Oct. 1 Feb. 15-March 1; Sept. 15-Oct. 1 18-24 inches 3-5
Cauliflower 9a Jan. 15-Feb. 1; Sept. 15-Oct. 1 Jan. 15-Feb. 1; Sept. 15-Oct. 1 Jan. 15-Feb. 1; Sept. 15-Oct. 1 18-24 inches 3-5
Cauliflower 9b Jan. 15-Feb. 1; Sept. 15-Oct. 1 Jan. 15-Feb. 1; Sept. 15-Oct. 1 Jan. 15-Feb. 1; Sept. 15-Oct. 1 18-24 inches 3-5
Cauliflower 10a Jan. 1-15; Sept. 15-Oct. 1 Jan. 1-15; Sept. 15-Oct. 1 Jan. 1-15; Sept. 15-Oct. 1 18-24 inches 3-5
Cauliflower 10b Jan. 1-15; Sept. 15-Oct. 1 Jan. 1-15; Sept. 15-Oct. 1 Jan. 1-15; Sept. 15-Oct. 1 18-24 inches 3-5
Cauliflower 11a Not recommended Not recommended Not recommended Not recommended Not recommended
Cauliflower 11b Not recommended Not recommended Not recommended Not recommended Not recommended

* Nursery seedlings are preferred, but if you start from seed, do so 4-6 weeks before the average last frost date. Transplant seedlings 2-4 weeks before the last frost date. Direct sow seeds 4-6 weeks before last frost date as well. Plant again in mid- to late summer for a fall harvest.

* This one was tricky because you don't really have to start seeds, so the dates for both seeds and seedlings are similar.