Planting Guide · July 2025 · 5 min read
Fall gardening extends your harvest well past the first frost, producing some of the sweetest and most flavorful crops of the year. The key is counting backward from your average first frost date to determine planting windows.
Look up your average first frost date and count backward by the days-to-maturity listed on the seed packet, adding 14 days as a "fall factor" for shorter days and cooler temperatures that slow growth. For most zones, this means sowing fall crops in mid-July through mid-August. Start transplants of broccoli, cauliflower, and cabbage indoors 6–8 weeks before your target transplant date for the strongest starts.
Lettuce, spinach, kale, and arugula thrive in fall's cooler temperatures and actually taste sweeter after a light frost converts starches to sugars. Root crops like carrots, beets, turnips, and radishes perform exceptionally well in fall when soil temperatures are declining rather than rising. Peas, both snap and snow varieties, produce a reliable fall harvest if planted early enough to flower before hard frost.
Lightweight row covers (0.5–1.0 oz/yard) add 4–8 degrees of frost protection and extend your harvest by three to six weeks past the first frost. Low tunnels made from wire hoops and greenhouse plastic create mini greenhouses that carry cold-hardy crops like spinach, mache, and claytonia into December or beyond. Mulch root crops with 6 inches of straw so you can continue digging carrots and beets even after the soil surface freezes.
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