Tennessee’s moderate temperatures support a spring turnip planting that matures before the hottest days arrive. Finding the best time to plant turnip in tennessee depends on your region’s frost dates and the turnip’s preference for cool weather. Turnips grow quickly, so timing your planting correctly ensures a tender, sweet harvest rather than a woody, bitter one.
Turnips are a cool-season crop that thrives in temperatures between 50°F and 65°F. In Tennessee, the growing season is split into two windows: spring and fall. The key is to plant so the roots develop before heat stress sets in, or after the summer heat fades.
Best Time To Plant Turnip In Tennessee
The best time to plant turnip in tennessee is early spring, about 2 to 4 weeks before the last expected frost date. For most of Tennessee, that means planting between mid-March and early April. In the eastern part of the state, where frost lingers longer, aim for late March to mid-April. In western Tennessee, you can plant as early as late February to early March.
Fall planting is also excellent. For a fall harvest, plant turnips 6 to 8 weeks before the first expected frost. In Tennessee, that usually falls between late August and mid-September. The cooler autumn temperatures actually improve flavor, making fall turnips sweeter than spring ones.
Spring Planting Windows By Tennessee Region
Tennessee spans USDA hardiness zones 6a to 7b, so planting dates vary. Here is a breakdown by region:
- West Tennessee (Memphis, Jackson): Plant from late February to mid-March. Last frost typically occurs around March 15–20.
- Middle Tennessee (Nashville, Cookeville): Plant from mid-March to early April. Last frost usually around March 25–April 5.
- East Tennessee (Knoxville, Chattanooga): Plant from late March to mid-April. Last frost can be as late as April 10–15.
Check your local frost dates using the Tennessee Extension Service’s online tool. A soil temperature of 40°F or higher is ideal for germination, but turnips can sprout in soil as cool as 35°F.
Fall Planting Windows By Tennessee Region
Fall turnips need time to mature before hard freezes. Plant these windows for best results:
- West Tennessee: Plant from late August to early September. First frost around October 15–20.
- Middle Tennessee: Plant from early September to mid-September. First frost around October 10–15.
- East Tennessee: Plant from mid-August to early September. First frost around October 5–10.
Fall turnips often have fewer pest problems and better flavor. The cooler nights concentrate sugars in the roots.
Factors That Affect Turnip Planting Timing
Soil Temperature Requirements
Turnip seeds germinate best when soil temperatures are between 50°F and 75°F. In Tennessee, spring soil warms slowly, especially in shaded areas. Use a soil thermometer to check. If the soil is below 40°F, wait a week. Seeds may rot in cold, wet soil.
For fall planting, soil is often still warm from summer. Aim for soil temperatures below 80°F. If you plant too early in fall, heat stress can cause bolting (flowering) or bitter roots.
Days To Maturity For Turnip Varieties
Turnip varieties mature in 30 to 60 days. Check the seed packet for the exact days. Common varieties in Tennessee include:
- Purple Top White Globe: 50–55 days. A classic, reliable choice.
- Tokyo Cross: 35–40 days. Fast and tender, great for spring.
- Hakurei: 35–45 days. Sweet and mild, perfect for salads.
- Seven Top: 40–50 days. Grown mainly for greens, not roots.
Count backward from your expected frost date to determine planting time. For example, if you want a fall harvest and your first frost is October 15, plant a 50-day variety by late August.
Weather Patterns In Tennessee
Tennessee weather is unpredictable. Late spring frosts can damage young turnip plants. Keep row covers or frost cloth handy for sudden cold snaps. In fall, early frosts are rare but possible. Turnips tolerate light frosts well, but hard freezes below 25°F can damage roots.
Rainfall also matters. Turnips need consistent moisture, especially during root development. In spring, Tennessee often gets plenty of rain. In fall, you may need to water if September is dry. Avoid waterlogged soil, which causes root rot.
Step-By-Step Guide To Planting Turnips In Tennessee
- Prepare the soil. Turnips prefer loose, well-drained soil with a pH of 6.0 to 6.8. Remove rocks and debris. Work in 2 inches of compost or aged manure a week before planting.
- Choose the right variety. For spring, pick fast-maturing types like Tokyo Cross. For fall, any variety works, but Purple Top is popular.
- Sow seeds directly. Turnips do not transplant well. Plant seeds ½ inch deep, 1 inch apart, in rows 12 to 18 inches apart. Thin seedlings to 3 to 4 inches apart when they are 2 inches tall.
- Water thoroughly. Keep soil moist but not soggy. Water 1 inch per week if rain is scarce. Use drip irrigation or a soaker hose to avoid wetting leaves.
- Mulch lightly. A thin layer of straw or grass clippings helps retain moisture and suppress weeds. Avoid heavy mulch that blocks sunlight.
- Fertilize sparingly. Turnips need low nitrogen. Too much nitrogen produces lush greens but small, woody roots. Use a balanced fertilizer like 10-10-10 at planting time.
- Monitor for pests. Watch for flea beetles, aphids, and root maggots. Use row covers early in the season. Handpick pests or use insecticidal soap if needed.
- Harvest at the right size. Spring turnips are best when 1 to 2 inches in diameter. Fall turnips can grow larger, up to 3 inches, without becoming tough. Pull them before heavy frost.
Common Mistakes When Planting Turnips In Tennessee
Planting Too Late In Spring
If you plant turnips in May, the heat will make them bolt or turn woody. Spring planting must happen before temperatures consistently exceed 75°F. In Tennessee, that means finishing planting by early April in most areas.
Planting Too Early In Fall
Planting in late August is fine, but if you plant in mid-July, the heat will stress the seeds. Wait until soil temperatures drop below 80°F. In Tennessee, that is usually after August 20.
Overcrowding Seedlings
Turnips need space to form roots. If you skip thinning, you will get spindly, misshapen turnips. Thin to 3 to 4 inches apart for best results. Use the thinnings in salads.
Ignoring Soil PH
Turnips prefer slightly acidic soil. If your pH is below 6.0, roots may be stunted. Test your soil every few years. Add lime in fall to raise pH for the next spring planting.
Turnip Varieties That Perform Best In Tennessee
Not all turnip varieties thrive in Tennessee’s climate. Here are top picks based on local experience:
- Purple Top White Globe: The most common variety in the state. It handles both spring and fall planting well. Roots are white with purple shoulders, and greens are tasty.
- Tokyo Cross: A Japanese hybrid that matures in just 35 days. It is perfect for quick spring crops. Roots are white, smooth, and mild.
- Hakurei: Another Japanese variety, known for its sweetness. It is excellent for eating raw. Plant in fall for the best flavor.
- Seven Top: Grown mainly for its nutritious greens. It produces small roots but abundant leaves. Good for spring or fall.
- Golden Ball: A heirloom variety with yellow flesh. It stores well and has a buttery taste. Plant in fall for winter storage.
How To Extend Your Turnip Harvest In Tennessee
You can enjoy turnips for months by using succession planting. In spring, plant a new batch every 2 weeks from March through early April. This gives you a continuous harvest from late April to June.
For fall, plant a second round in early September if your first frost date is late. In western Tennessee, you can sometimes plant into mid-September. In east Tennessee, stick to early September.
Another trick is to plant turnips in containers. Use pots at least 8 inches deep. Move them to a shaded spot if a heat wave hits. This works well for small spaces or patios.
Harvesting And Storing Turnips In Tennessee
Harvest spring turnips as soon as they reach 1 to 2 inches in diameter. Waiting too long makes them tough and pungent. Fall turnips can stay in the ground longer, but pull them before a hard freeze.
To store, remove the greens (use them within a few days). Brush off soil but do not wash. Store roots in a plastic bag in the refrigerator. They keep for 2 to 4 weeks. For longer storage, layer them in damp sand in a cool basement or root cellar.
Greens are best eaten fresh. Wash them thoroughly and sauté with garlic. They are packed with vitamins A, C, and K.
Frequently Asked Questions
Can I plant turnips in Tennessee in summer?
Summer planting is not recommended. Turnips need cool weather. High temperatures cause bolting and poor root quality. Stick to spring and fall.
What is the latest I can plant turnips in Tennessee?
For fall, the latest is about 6 weeks before your first frost. In most of Tennessee, that is mid-September. In east Tennessee, early September is safer.
Do turnips need full sun in Tennessee?
Yes, turnips need at least 6 hours of direct sun daily. Partial shade leads to smaller roots and leggy greens.
How deep should I plant turnip seeds in Tennessee soil?
Plant seeds ½ inch deep. In heavy clay soil, plant slightly shallower, about ¼ inch. Cover lightly with soil and water gently.
Can I grow turnips in containers in Tennessee?
Yes, use containers at least 8 inches deep. Choose a compact variety like Tokyo Cross. Place in full sun and water regularly.
Final Tips For Tennessee Turnip Growers
Turnips are one of the easiest vegetables to grow in Tennessee. They are forgiving of minor mistakes and provide quick rewards. The best time to plant turnip in tennessee is early spring or late summer, depending on your goal.
Keep a garden journal to track your planting dates and harvest results. Over a few seasons, you will learn the perfect timing for your specific microclimate. Tennessee’s diverse regions mean that what works in Memphis may not work in Johnson City.
If you are new to gardening, start with a small patch. Plant a 10-foot row of Purple Top turnips. You will have fresh roots and greens in under two months. The satisfaction of pulling your first homegrown turnip is worth the effort.
Remember to water consistently, thin seedlings, and watch for pests. With these steps, you will enjoy a bountiful turnip harvest from spring through fall. Happy planting!