When should I plant turnips for optimal growth?
Written by
Tina Carter
Reviewed by
Prof. Samuel Fitzgerald, Ph.D.Timing your turnip planting is everything! These cool-weather crops have preferred temperature ranges within which they thrive. In the spring, plant 4 weeks before your area's last frost date. In the fall, plant 8-10 weeks before your anticipated first frost. I keep a close record of soil temperatures for optimum germination.
Spring Planting Protocol
- Soil must reach minimum 40°F (4.4°C) for germination
- Use row covers if temperatures drop below 35°F (1.7°C)
- Prioritize quick-maturing varieties like Tokyo Cross
- Harvest before daily temperatures exceed 75°F (23.9°C)
Fall Planting Advantages
- Cooler temperatures prevent woody texture
- Light frost exposure increases sugar content
- Fewer pest problems than spring crops
- Extend harvest by leaving roots in ground until December
Soil temperature is a more reliable indicator of your planting success than the calendar dates. The best way to determine soil temperature is to use a soil thermometer at a depth of 4 inches. Spring planting should occur at temperatures between 40-50°F, and Fall planting can tolerate cooler soil temperatures in the 45-55°F range. I test various spots in the garden, since shaded areas warm more slowly.
Frost modifies the flavor of turnips through natural chemical reactions. A light frost of 28-32°F turns starches into sugars. The cold response creates sweeter, milder roots. Protect plants from temperatures below 25°F with row covers. I always let fall crops have 2-3 light frosts before harvest.
Succession planting really maximizes your harvest window, sow new rows every 2-3 weeks during the peak seasons, and switch varieties according to temperature and seasons using heat-tolerant varieties for summer. Keep track of your planting dates each year to establish your personal schedule.
Read the full article: When to Plant Turnips for Best Results
