Kentucky’s variable spring weather means turnips need careful timing to avoid bolting. Finding the Best Time To Plant Turnip In Kentucky is key to getting a good harvest. You want roots that are tender and sweet, not woody or tough.
Turnips are a cool-season crop. They grow best when the weather is mild. In Kentucky, you have two main planting windows: early spring and late summer. Each has its own benefits and challenges.
Understanding Kentucky’s Climate For Turnips
Kentucky sits in USDA hardiness zones 6a to 7a. This means winters are cold but not extreme, and summers can get hot and humid. Turnips hate heat. When temperatures stay above 80°F, the roots get tough and the plant bolts, or goes to seed.
Your goal is to plant so turnips mature during cool weather. For spring planting, you want harvest before summer heat. For fall planting, you want harvest after the heat breaks but before a hard freeze.
Soil temperature matters a lot. Turnip seeds germinate best when soil is between 50°F and 75°F. They can sprout in soil as cold as 40°F, but it takes longer. Warmer soil speeds things up.
Spring Planting Window In Kentucky
For spring turnips, plant 2 to 4 weeks before the last expected frost. In Kentucky, the last frost typically happens between April 10 and April 20 in most areas. In higher elevations or northern parts, it may be closer to May 1.
So your spring planting window is usually:
- Western Kentucky: March 15 to April 1
- Central Kentucky: March 20 to April 5
- Eastern Kentucky: March 25 to April 10
You can plant as soon as the ground is workable. If the soil is too wet, wait a few days. Working wet soil ruins its structure. Turnips need loose, well-drained soil for good root development.
One trick: plant a small test row first. If seeds germinate in 7 to 10 days, conditions are right. If they take longer, the soil may still be too cold.
Fall Planting Window In Kentucky
Fall turnips are often sweeter than spring turnips. Cool nights increase sugar content. The fall planting window is more forgiving because the weather cools down as the crop matures.
Count backwards from your first expected frost. Kentucky’s first frost usually hits between October 10 and October 20 in most areas. Turnips need 45 to 65 days to mature, depending on the variety.
So your fall planting window is:
- Late maturing varieties (60-65 days): Plant July 25 to August 5
- Early maturing varieties (45-50 days): Plant August 10 to August 25
Fall turnips can handle light frosts. In fact, a light frost improves their flavor. But a hard freeze below 28°F can damage the roots. If a hard freeze is forecast, harvest immediately.
Best Time To Plant Turnip In Kentucky
The single best time is late summer for a fall harvest. Specifically, the first two weeks of August. This timing avoids the worst of the summer heat while giving turnips enough time to mature before frost.
Why fall planting is better:
- Cooler soil and air temperatures
- Fewer pest problems like flea beetles
- Sweeter, more tender roots
- Longer harvest window
But spring planting works too, especially if you want early greens or roots. Just be ready to harvest before June heat sets in.
Soil Preparation For Turnips
Turnips grow best in sandy loam soil with a pH between 6.0 and 7.0. Kentucky soil is often clay-heavy. You can improve it by adding compost or aged manure before planting.
Steps to prepare your soil:
- Test your soil pH. Kits are available at garden centers or through your county extension office.
- If pH is below 6.0, add lime in the fall before spring planting.
- Work in 2 to 3 inches of compost to a depth of 8 to 10 inches.
- Remove rocks and debris that can deform roots.
- Rake the bed smooth and level.
Turnips don’t need heavy fertilizer. Too much nitrogen makes lush tops but small, poor-quality roots. A balanced 10-10-10 fertilizer applied at planting is enough.
Choosing The Right Turnip Variety For Kentucky
Not all turnips are the same. Some handle heat better. Some mature faster. For Kentucky, choose varieties that mature in 45 to 60 days.
Good spring varieties:
- Purple Top White Globe – classic, reliable, 55 days
- Tokyo Cross – fast, 35 days, good for spring
- White Egg – mild flavor, 50 days
Good fall varieties:
- Gilfeather – sweet, stores well, 60 days
- Golden Ball – yellow flesh, mild, 60 days
- Hakurei – Japanese type, very sweet, 38 days
You can also mix varieties. Plant some fast-maturing types for early harvest and slower ones for storage.
How To Plant Turnip Seeds
Turnip seeds are small. Plant them 1/4 to 1/2 inch deep. Space seeds 1 inch apart in rows 12 to 18 inches apart. After seedlings emerge, thin them to 3 to 4 inches apart.
Thinning is important. Crowded turnips produce small, misshapen roots. Don’t skip this step. You can eat the thinned greens in salads.
Water the soil gently after planting. Use a fine spray so seeds don’t wash away. Keep the soil moist until seeds germinate, which takes 5 to 10 days depending on temperature.
Watering And Care During Growth
Turnips need consistent moisture. Give them about 1 inch of water per week. If rainfall is scarce, water deeply once a week rather than shallowly every day.
Inconsistent watering causes roots to crack or become woody. Mulch around plants with straw or grass clippings to hold moisture and keep soil cool.
Weed control is important. Weeds compete for nutrients and water. Hand-pull weeds carefully so you don’t disturb turnip roots. A light hoeing works too, but don’t dig too deep.
Common Pests And Diseases In Kentucky
Flea beetles are the most common pest. They make small holes in leaves. In severe cases, they can kill young plants. Use row covers to protect seedlings. Diatomaceous earth also helps.
Aphids sometimes attack turnip greens. Spray them off with a strong stream of water. Insecticidal soap works if needed.
Root maggots can tunnel into turnip roots. Rotate crops each year. Don’t plant turnips where other brassicas grew the previous season.
Diseases are rare but include club root and downy mildew. Good soil drainage and proper spacing reduce risk.
When To Harvest Turnips
Spring turnips are ready 45 to 60 days after planting. Harvest when roots are 2 to 3 inches in diameter. Don’t let them get too big. Larger roots are often tough and woody.
Fall turnips can be left in the ground longer. Light frosts improve sweetness. But harvest before a hard freeze. You can store fall turnips in a root cellar or refrigerator for several weeks.
How to harvest:
- Loosen soil around the root with a garden fork.
- Grasp the greens near the base and pull gently.
- Cut off the greens, leaving 1 inch of stem.
- Brush off soil but don’t wash until ready to use.
Turnip greens are edible too. Harvest them when leaves are 4 to 6 inches tall. They taste like mustard greens. Cook them or eat raw in salads.
Succession Planting For Continuous Harvest
To extend your harvest, plant every 2 to 3 weeks. For spring, plant a row in mid-March, then another in early April. For fall, plant in early August, then again in late August.
This works best with fast-maturing varieties. Tokyo Cross matures in 35 days, so you can get multiple plantings in one season.
Keep in mind that summer heat limits spring succession. By late May, it’s usually too hot for new turnip seeds to germinate well. Focus on fall succession instead.
Growing Turnips In Containers
If you don’t have garden space, grow turnips in containers. Use a pot at least 12 inches deep with drainage holes. Fill with loose potting mix.
Plant seeds 1/2 inch deep and 1 inch apart. Thin to 3 inches apart after germination. Place the container in full sun, at least 6 hours per day.
Container turnips need more frequent watering. Check soil daily. Water when the top inch feels dry. Fertilize with a liquid vegetable fertilizer every 2 weeks.
Harvest container turnips when roots are 1 to 2 inches. They won’t get as large as in-ground turnips, but they’ll be tender and sweet.
Frequently Asked Questions About Turnip Planting In Kentucky
Can I Plant Turnips In Kentucky In June?
June is too late for spring turnips and too early for fall turnips. The heat will make roots tough. Wait until late July or early August for fall planting.
How Deep Should I Plant Turnip Seeds In Kentucky Clay Soil?
Plant 1/4 inch deep in clay soil. Clay holds moisture, so seeds don’t need to be as deep. If your soil is heavy, consider raised beds for better drainage.
Do Turnips Need Full Sun In Kentucky?
Yes, turnips need at least 6 hours of direct sun daily. Partial shade reduces root size and quality. Choose a sunny spot in your garden.
What Is The Best Turnip Variety For Kentucky Fall Planting?
Gilfeather and Hakurei are top choices for fall. Gilfeather stores well. Hakurei is very sweet and matures fast. Both handle Kentucky’s fall weather well.
Can I Plant Turnips After Tomatoes In Kentucky?
Yes, turnips make a good follow-up crop after tomatoes. Tomatoes are heavy feeders, but turnips need less nitrogen. Just add compost before planting turnips.
Final Tips For Kentucky Turnip Growers
Start small if you’re new to turnips. A 10-foot row is plenty for a family. You can always plant more next season.
Keep a garden journal. Note when you planted, when you harvested, and how the weather was. This helps you refine your timing each year.
Share your harvest with neighbors. Turnips are not everyone’s favorite, but fresh ones taste much better than store-bought. You might convert a few people.
Don’t forget the greens. They are nutritious and easy to cook. Saute them with garlic and olive oil for a quick side dish.
If you miss the spring window, don’t worry. Fall planting is actually better in Kentucky. Mark your calendar for early August and try again.
Turnips are forgiving. Even if your timing is off a week or two, you’ll likely get a decent harvest. The key is avoiding extreme heat and cold. With the right timing, you’ll enjoy sweet, tender turnips from your Kentucky garden.