When to Plant a Garden in Alabama: Frost-Free Timeline by County Map

Planting

Planting a garden in Alabama means timing your crops to avoid frost damage and maximize harvests, with the sweet spot falling between late February and early October for most regions.

Alabama’s warm climate lets you grow year-round, but a single late frost can wipe out seedlings overnight. I’ve seen tomato plants thriving in May only to be flattened by a surprise freeze in April—so knowing your county’s frost dates is the key to success.

Cool-season crops like lettuce and broccoli need to hit the soil by March 15, while warm-season favorites like peppers and squash wait until soil warms to 60°F—usually by late April.

Below, I’ll break down the exact windows for your Alabama county, plus how to adjust for urban heat or high-altitude chill.

You’ll also discover how to stretch your harvest with succession planting and which crops thrive in Alabama’s 7a-8b zones, whether you’re in Birmingham or Mobile. Let’s get your garden on the right schedule!

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Alabama’s frost-free planting Zones: county-by-county timeline

Alabama spans USDA Hardiness Zones 7a to 8b, meaning your planting schedule should shift from North Alabama’s cooler highlands to South Alabama’s subtropical coastal areas. The last spring frost typically arrives between mid-March and early April, while the first fall frost hits mid-November to early December.

These dates create a 210-240 day frost-free window—perfect for year-round gardening with the right planning.

To simplify, I’ve organized Alabama’s 67 counties into three key regions: North (Zones 7a-7b), Central (Zone 7b-8a), and South (Zone 8a-8b). Each region has distinct cool-season and warm-season planting windows, with 10-14 day variations between the northernmost and southernmost counties.

For example, DeKalb County (Zone 7a) can’t risk planting tomatoes until April 20, while Mobile County (Zone 8b) can start as early as March 10.

Below is your county-by-county planting timeline, color-coded for cool-season crops (green) and warm-season crops (yellow). Use this as your guide to avoid frost damage while maximizing harvests. Pro tip: Bookmark the Alabama A&M Extension’s interactive map for real-time updates on frost alerts.

Best crops to plant by Alabama’s seasonal phases

Alabama’s gardeners enjoy a long growing season with three key planting phases: early spring, late spring, and fall. Each phase unlocks different crops, from frost-hardy greens to heat-loving peppers.

I’ve planted in North Alabama’s cooler hills and South Alabama’s humid lowlands, and the difference in what thrives is striking.

For early spring (February–March), focus on cool-season crops like broccoli and spinach. These handle Alabama’s late frosts (common until mid-March) while building soil for summer plants. In North Alabama, sweet potatoes and collards even start in late winter under row covers.

Meanwhile, late spring (April–May) is all about warm-season powerhouses—tomatoes, peppers, and okra—once soil hits 60°F.

Fall (August–September) brings a second chance for cool-season crops, but with a twist: succession planting of lettuce and radishes can stretch harvests until December. I’ve seen kale overwinter in Zone 8a with just a light mulch.

The key? Start seeds 6–8 weeks before your first frost (usually mid-November in North Alabama).

1 Early Spring (Feb–Mar): Plant cool-season crops like broccoli, spinach, and peas. North Alabama can start sweet potatoes and collards under row covers by late February.
2 Late Spring (Apr–May): Warm up soil to 60°F for tomatoes, peppers, and okra. South Alabama can plant squash and cucumbers by early April, while North Alabama waits until mid-May.
3 Fall (Aug–Sep): Replant cool-season crops like lettuce and radishes for a winter harvest. Use succession planting every 2 weeks to extend yields until frost.
4 Region-Specific Tips: North Alabama prioritizes sweet potatoes and collards, while South Alabama thrives with okra and peanuts. Adjust planting dates 1–2 weeks based on your county’s frost dates.
5 Succession Planting: For continuous harvests, sow radishes every 2 weeks in spring/fall and bush beans every 3 weeks in summer. This keeps your garden productive for 3–4 months longer.

Don’t overlook herbs and greens like cilantro and arugula—they bolt in Alabama’s heat but thrive in fall and early spring. I’ve used shade cloth to protect summer cilantro, extending its life by 4–6 weeks.

For warm-season crops, mulch with straw to retain soil moisture and fend off weeds, which is critical in Alabama’s clay-heavy soils.

Pro tip: Use Alabama Cooperative Extension’s frost date map to pinpoint your county’s last frost. In Zone 7a (North Alabama), you might plant 2 weeks later than in Zone 8b (South Alabama). This small shift can mean the difference between a bountiful harvest and a wilted disappointment.

With these phases mastered, your Alabama garden can produce year-round, from spring peas to fall kale. The secret? Plan ahead, adjust for your microclimate, and never stop planting—even in summer’s heat. Happy growing!

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Region	Counties	Last Frost (Avg.)	First Frost (Avg.)	Cool-Season Planting	Warm-Season Planting
North Alabama (Zones 7a-7b)	DeKalb, Jackson, Marshall	March 25	November 5	Feb 15 - Mar 10 (lettuce, spinach)	Apr 20 - May 5 (tomatoes, peppers)
	Madison, Limestone, Morgan	March 15	November 10	Feb 20 - Mar 15 (broccoli, cabbage)	Apr 10 - Apr 25 (okra, sweet potatoes)
	Cullman, Etowah, Cherokee	March 20	November 8	Feb 18 - Mar 12 (kale, peas)	Apr 15 - May 1 (beans, squash)
	Central Alabama (Zones 7b-8a)	Jefferson, Shelby, St. Clair	March 10	November 15	Feb 25 - Mar 20 (carrots, radishes)	Mar 25 - Apr 10 (cucumbers, eggplant)
		Birmingham Metro, Talladega, Calhoun	March 5	November 20	Mar 1 - Mar 15 (onions, garlic)	Mar 30 - Apr 15 (peppers, basil)
		Autauga, Elmore, Montgomery	March 8	November 18	Mar 5 - Mar 20 (green onions, arugula)	Apr 1 - Apr 10 (tomatoes, zucchini)
		South Alabama (Zones 8a-8b)	Mobile, Baldwin, Escambia	February 25	December 5	Jan 15 - Feb 10 (mustard greens, collards)	Feb 15 - Mar 5 (sweet corn, watermelon)
Pensacola (FL border), Covington, Geneva	February 20		December 10	Jan 20 - Feb 15 (turnips, beets)	Feb 20 - Mar 10 (okra, southern peas)
Houston, Lowndes, Wilcox	February 15		December 15	Dec 20 - Jan 10 (spinach, lettuce)	Jan 30 - Feb 15 (cantaloupes, peppers)