2024 Guide to Fall Brassica Seeding for Deer Food Plots: 7 Pro Tips

Fall brassica seeding for deer food plots is one of the most reliable strategies to keep deer frequenting your property through late fall and winter, when native forage runs scarce. Brassicas—including turnips, radishes, rapeseed, and kale—are cold-hardy, high in nutrition, and beloved by whitetails and other game species. A properly timed seeding can produce up to 10 tons of forage per acre, according to the University of Illinois Extension, making it a high-return investment for any wildlife manager.

Why Brassicas Are the Top Choice for Fall Deer Food Plots

Brassicas are uniquely suited to fall deer food plots because they thrive in cool weather and continue to produce forage even after light frosts. Penn State Extension records that brassicas contain 15-25% crude protein, a nutrient critical for deer to build winter fat reserves and support healthy fawn development the following spring. Unlike warm-season grasses that die off with the first cold snap, brassicas stay palatable for deer through most of the winter, especially in moderate climates.

Deer are also highly attracted to the bulbous roots of turnips and radishes, which become sweet as frost converts starches to sugars. This dual forage source—leafy tops for early fall browsing and roots for winter feeding—means brassicas keep deer coming back to your plot month after month. No other common food plot crop delivers this length of consistent use for the same low seeding cost.

Step-by-Step Guide to Successful Fall Brassica Seeding

Test and Prep Your Soil First

Brassicas grow best in well-drained soil with a pH between 6.0 and 7.0, so start with a soil test 3-6 months before your planned seeding date. Your local county extension office can provide affordable soil tests that detail what lime and fertilizer you need to add to hit optimal levels. Adding lime if your soil is too acidic can boost forage yields by up to 40%, according to the University of Missouri Extension.

Time Your Seeding Perfectly

Timing is the most critical factor for successful fall brassica seeding. In most northern U.S. states, seed 6-8 weeks before the first average frost date to give crops enough time to mature before winter. In southern states, seed 4-6 weeks before the first frost to avoid warm temperatures that cause stunted, leggy growth. Seeding at the right time ensures your brassicas develop thick foliage and full roots before cold weather sets in.

Choose the Right Blend for Your Region

Avoid single-crop brassica seed mixes; instead, opt for a blend that includes turnips, forage radishes, and kale to extend the plot’s usability. For northern climates, choose cold-hardy kale varieties that can survive temperatures as low as 10°F. For southern plots, prioritize turnips and rapeseed that handle milder winters and heavier browsing pressure. Most pre-mixed deer food plot brassica blends are tailored to specific hardiness zones, so check the label before buying.

Plant at the Correct Depth and Rate

Brassica seeds are small, so they only need to be planted ¼ to ½ inch deep to germinate successfully. Planting too deep is the number one reason for poor germination rates, per the National Wild Turkey Federation. For a pure brassica stand, use 5-10 pounds of seed per acre. If you’re mixing brassicas with clover or ryegrass, reduce the brassica rate to 3-5 pounds per acre to avoid overcrowding.

Common Mistakes That Ruin Your Brassica Food Plot

One of the most common mistakes is waiting too long to seed, which leads to underdeveloped crops that die before winter. Another frequent error is overgrazing early in the fall; if you notice deer eating more than 70% of the foliage before mid-November, add a temporary electric fence to protect the plot for winter use. Failing to control weeds during the first 30 days of growth can also choke out young brassicas, as they are poor competitors with aggressive weeds like pigweed.

Frequently Asked Questions

When is the best time to seed fall brassicas for deer food plots?

The ideal seeding window depends on your location: northern U.S. zones 3-5 need seeding 6-8 weeks before the first frost (mid-August to early September), while southern zones 6-9 can seed 4-6 weeks before the first frost (mid-September to early October).

How much brassica seed do I need per acre for a deer food plot?

For a pure brassica stand, use 5-10 pounds of seed per acre. If you’re mixing brassicas with clover, ryegrass, or other winter forages, reduce the brassica rate to 3-5 pounds per acre to prevent overcrowding and support a diverse forage base.

Will deer eat brassicas all winter long?

Yes, deer will feed on brassica leafy tops through late fall, then dig up the sweet, nutrient-dense roots of turnips and radishes throughout the winter. In mild climates with minimal snow cover, brassicas can provide forage through February, while areas with heavy snow may see brassicas last through December.

By following these simple steps, you can plant a high-yield brassica food plot that attracts and supports deer for months after native forage runs out. With proper planning, your fall seeding will pay off with a healthier, more visible herd all hunting season long.