Plant name | Zone | Start seeds indoors | Start seeds outdoors | Plant seedlings/transplants outdoors | Plant spacing | # plants per person |
Sweet potatoes | 3a | Not recommended | Not recommended | On/around June 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 3b | Not recommended | Not recommended | On/around June 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 4a | Not recommended | Not recommended | On/around June 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 4b | Not recommended | Not recommended | On/around June 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 5a | Not recommended | Not recommended | On/around May 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 5b | Not recommended | Not recommended | On/around May 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 6a | Not recommended | Not recommended | On/around May 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 6b | Not recommended | Not recommended | On/around May 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 7a | Not recommended | Not recommended | On/around May 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 7b | Not recommended | Not recommended | On/around May 15 (a month after last frost date) | 12-18 inches | 5 |
Sweet potatoes | 8a | Not recommended | Not recommended | Feb. 15-May 15; Sept. 15-Nov. 30 | 12-18 inches | 5 |
Sweet potatoes | 8b | Not recommended | Not recommended | Feb. 15-May 15; Sept. 15-Nov. 30 | 12-18 inches | 5 |
Sweet potatoes | 9a | Not recommended | Not recommended | Jan. 15-April 15; Sept. 15-Dec. 15 | 12-18 inches | 5 |
Sweet potatoes | 9b | Not recommended | Not recommended | Jan. 15-April 15; Sept. 15-Dec. 15 | 12-18 inches | 5 |
Sweet potatoes | 10a | Not recommended | Not recommended | March-May; October-December | 12-18 inches | 5 |
Sweet potatoes | 10b | Not recommended | Not recommended | March-May; October-December | 12-18 inches | 5 |
Sweet potatoes | 11a | Not recommended | Not recommended | March-May; September-November | 12-18 inches | 5 |
Sweet potatoes | 11b | Not recommended | Not recommended | March-May; September-November | 12-18 inches | 5 |
* Sweet potatoes are actually tropical plants. They need to be planted in warm weather.