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Dianthus

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

Plant name Zone Start seeds indoors (spring/fall) Start seeds outdoors (spring/fall) Plant seedlings/transplants outdoors (spring/fall) Plant spacing # plants per person
Dianthus 3a March 15-April 1 On/around May 15 (after last frost) On/around May 15 (after last frost) 8-12 inches n/a
Dianthus 3b March 15-April 1 On/around May 15 (after last frost) On/around May 15 (after last frost) 8-12 inches n/a
Dianthus 4a March 15-April 1 On/around May 15 (after last frost) On/around May 15 (after last frost) 8-12 inches n/a
Dianthus 4b March 15-April 1 On/around May 15 (after last frost) On/around May 15 (after last frost) 8-12 inches n/a
Dianthus 5a Feb. 15-March 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 8-12 inches n/a
Dianthus 5b Feb. 15-March 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 8-12 inches n/a
Dianthus 6a Feb. 15-March 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 8-12 inches n/a
Dianthus 6b Feb. 15-March 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 8-12 inches n/a
Dianthus 7a Feb. 15-March 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 8-12 inches n/a
Dianthus 7b Feb. 15-March 1 On/around April 15 (after last frost) On/around April 15 (after last frost) 8-12 inches n/a
Dianthus 8a Jan. 15-Feb. 1 On/around March 15 (after last frost) On/around March 15 (after last frost) 8-12 inches n/a
Dianthus 8b Jan. 15-Feb. 1 On/around March 15 (after last frost) On/around March 15 (after last frost) 8-12 inches n/a
Dianthus 9a 6-8 weeks before planting outdoors year-round year-round 8-12 inches n/a
Dianthus 9b 6-8 weeks before planting outdoors year-round year-round 8-12 inches n/a
Dianthus 10a 6-8 weeks before planting outdoors year-round year-round 8-12 inches n/a
Dianthus 10b 6-8 weeks before planting outdoors year-round year-round 8-12 inches n/a
Dianthus 11a 6-8 weeks before planting outdoors year-round year-round 8-12 inches n/a
Dianthus 11b 6-8 weeks before planting outdoors year-round year-round 8-12 inches n/a

* Some varieties may grow as short-lived perennials in certain Zones. Consult the plant tag for specifics. Start seeds indoors 6-8 weeks before the average last frost date or direct sow or plant seedlings after the threat of frost has passed. Some varieties can tolerate a light frost.