What should you not plant in the fall?

Written by
Kiana Okafor
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.Fall planting involves avoiding crops that will not reach maturity before frost. In general, warm-season vegetables require both heat and lengthy days, which typically do not occur in autumn. As a result, attempts to plant them will only waste time and resources. Rather, cold-hardy types of crops should be researched and selected as an alternative for harvesting before winter approaches.
Warm-Season Trap Crops
- Tomatoes stop ripening when temperatures drop below 50°F
- Pepper plants drop flowers in cool nights
- Eggplants stall growth without consistent heat
Long-Season Maturation Risks
- Pumpkins require 90-120 frost-free days
- Sweet potatoes need warm soil until harvest
- Winter squash cannot harden before frost damage
Warm-season vegetables die with the cool temperatures of fall. Tomatoes will stop ripening if overnight temperatures drop below 50°F. Pepper plants abort their flowers in the lack of warmth. I've lost whole crops finding this out. Instead, consider planting quick-growing greens, which can be very successful in cooler temperatures.
Long-maturing crops such as pumpkins require constant warmth. The plants need 90 to 120 frost-free days to mature fully. Late fall frosts will occur before the fruits are mature. Sweet potatoes require warm soil, both before and after harvest; they are best planted in early summer.
Quick alternatives ensure reliable harvests. Kale tolerates temperatures as low as 20°F. Radishes reach maturity in about 25 days. Spinach continues to grow in your garden until a hard freeze occurs. These quick-growing crops will occupy your garden productively, ensuring you have fresh produce available throughout the winter.
Soil preparation is important for fall replacements. Compost can be added when planting cold-hardy vegetables. Apply a heavy layer of mulch to insulate and retain warmth. Using cold frames will extend the season even longer. These practices will help ensure that your fall garden can provide vegetables for your family to eat, even on short days.
Read the full article: When to Plant Vegetable Garden: Ultimate Guide