Plant name | Zone | Start seeds indoors (spring/fall) | Start seeds outdoors (spring/fall) | Plant seedlings/transplants outdoors (spring/fall) | Plant spacing | # plants per person |
Yarrow/Achillea | 3a | March 1-15 | On/around May 15 (after last frost) | On/around May 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 3b | March 1-15 | On/around May 15 (after last frost) | On/around May 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 4a | March 1-15 | On/around May 15 (after last frost) | On/around May 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 4b | March 1-15 | On/around May 15 (after last frost) | On/around May 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 5a | Feb. 1-15 | On/around April 15 (after last frost) | On/around April 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 5b | Feb. 1-15 | On/around April 15 (after last frost) | On/around April 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 6a | Feb. 1-15 | On/around April 15 (after last frost) | On/around April 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 6b | Feb. 1-15 | On/around April 15 (after last frost) | On/around April 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 7a | Feb. 1-15 | On/around April 15 (after last frost) | On/around April 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 7b | Feb. 1-15 | On/around April 15 (after last frost) | On/around April 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 8a | Jan. 1-15 | On/around March 15 (after last frost) | On/around March 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 8b | Jan. 1-15 | On/around March 15 (after last frost) | On/around March 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 9a | Dec. 1-15 | On/around Feb. 15 (after last frost) | On/around Feb. 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 9b | Dec. 1-15 | On/around Feb. 15 (after last frost) | On/around Feb. 15 (after last frost) | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 10a | year-round | year-round | year-round | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 10b | year-round | year-round | year-round | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 11a | year-round | year-round | year-round | 1-2 feet | 1 (or as needed for landscaping) |
Yarrow/Achillea | 11b | year-round | year-round | year-round | 1-2 feet | 1 (or as needed for landscaping) |
* Yarrow prefers hot weather. Start seeds indoors 8-10 weeks before the average last frost date or before planting outdoors. Grows as a perennial in Zones 9 and higher; grows as an annual elsewhere.