Extending Your Vegetable Harvest into Fall and Winter

Protecting Crops from Early Frosts

Fall brings brief cold snaps between mild weeks. A single frost kills tender annuals. Floating row covers (used for insect protection) trap earth-radiated warmth, providing a few degrees of frost protection. Use heavier grades for maximum benefit.

Plant Cold-Hardy Vegetables in Late Summer

Sow in late summer for fall/winter harvest: kale, spinach, collards, broccoli, cauliflower, Brussels sprouts, kohlrabi, turnips, cabbage, oriental greens, rutabagas, and some lettuces.

Protection Methods for Freezing Weather

• Cardboard boxes, fruit baskets for individual plants.
• Old sheets, blankets, heavy plastic tarps for rows/beds. Apply evening before freeze, remove next morning.
• Cloches (glass bells or rigid plastic) and portable cold frames (tubular frame with poly cover or aluminum with twin-wall polycarbonate). Vent during day.
• DIY cold frame: straw bales around bed topped with old window sashes.

Water as Thermal Mass

Water-filled jugs (painted black) absorb daytime heat, release it at night. Even frozen water releases significant heat. Place under covers or inside cold frames.

Crops That Survive Unprotected

Leeks, kale, collards withstand harsh winters. Fall-planted garlic and shallots root in fall, overwinter, emerge early spring. Root crops (beets, carrots, turnips, rutabagas, parsnips) can stay in ground under thick straw/leaf mulch—harvest as needed if ground isn't frozen. Finish before spring growth resumes.

Year-Round Harvest Is Possible

With planning and extra care, enjoy homegrown produce well beyond summer—potentially year-round.