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Larkspur

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

Plant name Zone Start seeds indoors (spring/fall) Start seeds outdoors (spring/fall) Plant seedlings/transplants outdoors (spring/fall) Plant spacing # plants per person
Larkspur 3a Not recommended April 15-May 1 Not recommended 9-18 inches n/a
Larkspur 3b Not recommended April 15-May 1 Not recommended 9-18 inches n/a
Larkspur 4a Not recommended April 15-May 1 Not recommended 9-18 inches n/a
Larkspur 4b Not recommended April 15-May 1 Not recommended 9-18 inches n/a
Larkspur 5a Not recommended March 15-April 1 Not recommended 9-18 inches n/a
Larkspur 5b Not recommended March 15-April 1 Not recommended 9-18 inches n/a
Larkspur 6a Not recommended March 15-April 1 Not recommended 9-18 inches n/a
Larkspur 6b Not recommended March 15-April 1 Not recommended 9-18 inches n/a
Larkspur 7a Not recommended March 15-April 1 Not recommended 9-18 inches n/a
Larkspur 7b Not recommended March 15-April 1 Not recommended 9-18 inches n/a
Larkspur 8a Not recommended Feb. 15-May 15; Aug. 1-Oct. 30 Not recommended 9-18 inches n/a
Larkspur 8b Not recommended Feb. 15-May 15; Aug. 1-Oct. 30 Not recommended 9-18 inches n/a
Larkspur 9a Not recommended Jan. 15-April 15; August-November Not recommended 9-18 inches n/a
Larkspur 9b Not recommended Jan. 15-April 15; August-November Not recommended 9-18 inches n/a
Larkspur 10a Not recommended March-May; September-November Not recommended 9-18 inches n/a
Larkspur 10b Not recommended March-May; September-November Not recommended 9-18 inches n/a
Larkspur 11a Not recommended March-May; September-November Not recommended 9-18 inches n/a
Larkspur 11b Not recommended March-May; September-November Not recommended 9-18 inches n/a

* Grows easily as direct-sown seeds. Sow as soon as soil can be worked in the spring. Can also be planted in the fall in Southern climates.