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Spinach

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

Plant name Zone Start seeds indoors Start seeds outdoors Plant seedlings/transplants outdoors Plant spacing # plants per person
Spinach 3a Not recommended April 15-May 1 April 1-15; July 15-Aug. 1 1 foot 10-15
Spinach 3b Not recommended April 15-May 1 April 1-15; July 15-Aug. 1 1 foot 10-15
Spinach 4a Not recommended April 15-May 1 April 1-15; July 15-Aug. 1 1 foot 10-15
Spinach 4b Not recommended April 15-May 1 April 1-15; July 15-Aug. 1 1 foot 10-15
Spinach 5a Not recommended March 15-April 1 March 1-15; Aug. 15-Sept. 1 1 foot 10-15
Spinach 5b Not recommended March 15-April 1 March 1-15; Aug. 15-Sept. 1 1 foot 10-15
Spinach 6a Not recommended March 15-April 1 March 1-15; Aug. 15-Sept. 1 1 foot 10-15
Spinach 6b Not recommended March 15-April 1 March 1-15; Aug. 15-Sept. 1 1 foot 10-15
Spinach 7a Not recommended March 15-April 1 March 1-15; Aug. 15-Sept. 1 1 foot 10-15
Spinach 7b Not recommended March 15-April 1 March 1-15; Aug. 15-Sept. 1 1 foot 10-15
Spinach 8a Not recommended Feb. 15-March 1 Feb. 1-15; Sept. 15-Oct. 1 1 foot 10-15
Spinach 8b Not recommended Feb. 15-March 1 Feb. 1-15; Sept. 15-Oct. 1 1 foot 10-15
Spinach 9a Not recommended April 1-May 15; Nov. 15-Dec. 30 April 1-May 15; Nov. 15-Dec. 30 1 foot 10-15
Spinach 9b Not recommended April 1-May 15; Nov. 15-Dec. 30 April 1-May 15; Nov. 15-Dec. 30 1 foot 10-15
Spinach 10a Not recommended April 1-May 15; Nov. 15-Dec. 30 April 1-May 15; Nov. 15-Dec. 30 1 foot 10-15
Spinach 10b Not recommended April 1-May 15; Nov. 15-Dec. 30 April 1-May 15; Nov. 15-Dec. 30 1 foot 10-15
Spinach 11a Not recommended April 1-30; Nov. 15-Dec. 30 April 1-30; Nov. 15-Dec. 30 1 foot 10-15
Spinach 11b Not recommended April 1-30; Nov. 15-Dec. 30 April 1-30; Nov. 15-Dec. 30 1 foot 10-15

* Starting your own seedlings is not recommended because they can be difficult to transplant. Purchase seedlings or direct sow. In colder climates, start seeds outdoors as soon as soil can be worked. Plant seedlings 4-6 weeks before the last frost, and again 6-8 weeks before the first frost for a fall harvest.