Brussels sprouts, carrots, beets, kale, spinach, radishes, turnips, and broccoli can all contribute to a fall harvest for Thanksgiving—but no crop is guaranteed to mature by the holiday in every region. Match each vegetable’s planting window and maturity time to your local first frost date, and follow the seed packet or plant tag for your chosen variety.
Choose crops by your local frost date
Start with the average first-frost date for your area, then count backward using the crop’s days to maturity. Check whether that figure starts at sowing or transplanting: Penn State Extension notes that for transplants, the seed-packet clock begins when the transplant is set outdoors, not when the seed is started indoors. See Penn State Extension’s Vegetable Seed Planting Guide and its guide to season extenders and fall vegetables.
Regional calendars matter as much as the calendar date. Illinois Extension gives different planting ranges for northern, central, and southern Illinois and advises checking the packet or plant tag. For example, the University of Illinois Extension and USDA calendar for McHenry County lists June 28 to July 8 as a fall-harvest planting window for several crops, including beets, broccoli transplants, Brussels sprouts transplants, carrots, and kale. That is a local example, not a nationwide schedule. Consult the McHenry County planting guide and Illinois Extension’s planting ranges for regional context.
8 fall vegetables to consider
1. Brussels sprouts
Brussels sprouts are a familiar Thanksgiving vegetable, but they need a long growing season. Illinois Extension advises transplanting them at least 90 to 100 days before the local first frost. Cool or lightly frosty weather suits the crop; warm conditions can interfere with compact sprout development. Plan this one early and check local transplanting guidance. Illinois Extension’s Brussels sprouts guide has the crop-specific advice.
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2. Carrots
Carrots offer a practical fall root harvest. Illinois Extension estimates about 50 days for baby carrots and up to 80 days for full-size carrots; the actual timing depends on variety and growing conditions. A light frost can make carrots sweeter, but that benefit should not be assumed for every vegetable. Use the maturity information on the packet to decide whether your planting date leaves enough time. Illinois Extension’s fall-harvest guidance covers carrots, beets, and radishes.
3. Beets
Beets can provide both greens and roots: you can harvest some leaves while the roots continue developing. In its fall-gardening guidance, Illinois Extension recommends harvesting roots when they are about 1½ to 2 inches in diameter. Check the variety’s maturity estimate and local planting window rather than assuming roots will reach that size by Thanksgiving. Illinois Extension’s late-summer gardening article includes beet harvest advice.
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4. Kale
Kale is a cool-season leafy crop included in extension guidance for fall gardens. Its planting window depends on where you live, so use a regional calendar and the variety’s packet directions. Penn State Extension and Illinois Extension include kale in their fall or cool-season vegetable guidance: Penn State’s planting guide, Illinois Extension’s planting ranges, and the McHenry County calendar.
5. Spinach
Spinach is another cool-season option that appears in fall vegetable and frost-tolerance guidance. Choose a planting date based on your local calendar and the variety’s stated maturity, and use crop-specific frost advice to decide whether extra protection is appropriate. See Penn State Extension’s planting guide and Illinois Extension’s frost and season-extension guidance.
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6. Radishes
Radishes are among the quickest fall crops. Illinois Extension says they may be ready to harvest in about a month under suitable conditions. That makes them a useful option when a long-season crop no longer fits your calendar, though local weather and the selected variety still affect timing. Check Illinois Extension’s fall-harvest advice for radishes.
7. Turnips
Turnips are cool-season roots included in extension guidance for fall gardens. Their time to maturity and planting window depend on variety and location, so use the packet and a regional planting calendar to judge whether a fall sowing suits your Thanksgiving plans. Penn State Extension’s planting guide and fall-vegetable guidance provide planning references.
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8. Broccoli
Broccoli is commonly grown from transplants for a fall crop. Extension guidance includes it among cool-season vegetables and discusses frost protection for fall production. Count maturity from the date the transplant goes outdoors when the packet gives transplant-based days to maturity, and follow regional transplanting advice. See Illinois Extension’s planting ranges, Penn State Extension’s fall-growing guide, and Illinois Extension’s frost advice.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Use frost protection without treating it as a guarantee
Frost tolerance differs by crop: some vegetables tolerate a light frost, while others can withstand harder frost. Illinois Extension’s 2025 guidance describes row covers as one option for protecting crops and extending fall production. A cover can help, but it does not guarantee that a crop will mature or remain harvestable through Thanksgiving. Check Illinois Extension’s frost guidance for distinctions among crops and protection options.
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Make the planting decision
- Find your local average first-frost date and the planting window for your region.
- Check the variety’s days to maturity and whether the count begins at seeding or transplanting.
- Give Brussels sprouts their longer lead time; consider quicker crops such as radishes when the season is shorter.
- Use crop-specific frost guidance. A light frost may improve carrot flavor, but frost response is not the same for every vegetable.
- Consider row covers where appropriate, while treating them as protection—not a promise of a Thanksgiving harvest.
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