Collard greens are a beloved staple in Southern cooking, offering both flavor and versatility in the garden. If you're planting in Alabama, understanding the best times to sow and transplant is crucial for a successful yield. With the median last spring frost in many Alabama areas hovering around April 3 in Zone 6b, timing your planting can make all the difference in your harvest.
In warmer zones like Zone 7b–8a, where the median last spring frost occurs as early as March 4, gardeners have a wider window for sowing collard greens. This extended frost-free season allows you to grow collards almost year-round with the right management, increasing your chances of harvesting those delicious, nutrient-rich leaves well into the winter months.
Collards thrive in a variety of conditions but need careful care to maximize their productivity. With harvestable leaves over several months, understanding how to manage these plants is essential. By learning when to plant and harvest based on frost dates, you'll enjoy a bountiful supply of nutritious greens throughout much of Alabama's growing season.
Mid-September is the last call for collards in Alabama. The direct-sowing window on this page runs through September 19, so if you're putting seed in the ground, do it this week. Transplants give you a little more slack and can go in through the end of the month.
It's still hot, and that's the main thing to manage. Water the row every morning until the seedlings are up, and don't worry if they sit still for a couple of weeks; once the nights cool off they take off.
The payoff comes later. Collards get sweeter after the first cold night, and in most of Alabama you'll be picking from the bottom of the plant up through Thanksgiving and past it. Pull a summer crop that's finished to make the room.
Updated September 15, 2026
| Zone | Indoor start | Transplant out | Direct sow | Harvest |
|---|---|---|---|---|
| Zone 6b | Start February 15 – March 1, ~6–8 weeks before April 3 | Transplant outdoors from April 15 – May 15, after the last frost | Direct sow from April 15 – May 15, after the last frost | Harvest from June through November, ideally after frost for improved flavor |
| Zone 7b–8a | Start January 20 – February 10, ~6–8 weeks before March 4 | Transplant outdoors from March 15 – April 15, before the last frost | Direct sow from March 15 – April 15, before the last frost | Harvest from April through November, especially tasty after frost |
| Zone 7a | Start February 15 – March 1, ~6–8 weeks before March 30 | Transplant outdoors from April 10 – May 10, after the last frost | Direct sow from April 10 – May 10, after the last frost | Harvest from May through November, with the best flavor after frost |
If you're gardening in a colder area, wait until the last frost date for your zone before planting collards outdoors. Consider starting them indoors earlier to get a head start and transplant them once conditions are optimal.
Yes, you can plant collard greens in May, especially in warmer areas like Zone 7b–8a. Just ensure the danger of frost has passed, and consider using varieties that mature quickly for a late-season harvest.
You can harvest collard greens every couple of weeks once they reach 10–12 inches in height. Regular picking encourages the plant to produce more leaves and keeps them healthy throughout the growing season.
Wilting can be caused by drought or disease. Make sure you're watering adequately; if the soil feels dry, give your plants a deep watering. Inspect for pests and diseases as well to take proper actions.
Store collard greens in the refrigerator in a breathable bag, such as a perforated plastic bag. They can last up to a week when stored properly, and blanching them before freezing is a great way to extend their shelf life.
Typical fall sowing window for Collard Greens in Alabama: August 29 – September 19.