Plant name | Zone | Start seeds indoors (spring/fall) | Start seeds outdoors (spring/fall) | Plant seedlings/transplants outdoors (spring/fall) | Plant spacing | # plants per person |
Dahlia | 3a | March 15-April 1 | On/around May 30 (2 weeks after last frost) | On/around May 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 3b | March 15-April 1 | On/around May 30 (2 weeks after last frost) | On/around May 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 4a | March 15-April 1 | On/around May 30 (2 weeks after last frost) | On/around May 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 4b | March 15-April 1 | On/around May 30 (2 weeks after last frost) | On/around May 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 5a | Feb. 15-March 1 | On/around April 30 (2 weeks after last frost) | On/around April 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 5b | Feb. 15-March 1 | On/around April 30 (2 weeks after last frost) | On/around April 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 6a | Feb. 15-March 1 | On/around April 30 (2 weeks after last frost) | On/around April 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 6b | Feb. 15-March 1 | On/around April 30 (2 weeks after last frost) | On/around April 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 7a | Feb. 15-March 1 | On/around April 30 (2 weeks after last frost) | On/around April 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 7b | Feb. 15-March 1 | On/around April 30 (2 weeks after last frost) | On/around April 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 8a | Jan. 15-Feb. 1 | On/around March 30 (2 weeks after last frost) | On/around March 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 8b | Jan. 15-Feb. 1 | On/around March 30 (2 weeks after last frost) | On/around March 30 (2 weeks after last frost) | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 9a | 6-8 weeks before planting outdoors | Nov. 1-May 30 | Nov. 1-May 30 | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 9b | 6-8 weeks before planting outdoors | Nov. 1-May 30 | Nov. 1-May 30 | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 10a | 6-8 weeks before planting outdoors | Nov. 1-May 30 | Nov. 1-May 30 | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 10b | 6-8 weeks before planting outdoors | Nov. 1-May 30 | Nov. 1-May 30 | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 11a | 6-8 weeks before planting outdoors | Nov. 1-May 30 | Nov. 1-May 30 | 9 inches-3 feet (depending on variety) | n/a |
Dahlia | 11b | 6-8 weeks before planting outdoors | Nov. 1-May 30 | Nov. 1-May 30 | 9 inches-3 feet (depending on variety) | n/a |
* Dahlias grow as tubers and come in a wide variety of colors and sizes. Tubers can be grown as perennials in Zone 8 and higher; otherwise, grow them as annuals or dig up tubers and store for the winter.