Best Time To Plant Turnip In Kansas

Kansas gardeners must work around intense summer heat when scheduling turnip planting. The best time to plant turnip in Kansas is actually a two-season window: early spring for a late spring harvest, and late summer for a fall crop. This timing helps you avoid the scorching July and August temperatures that can ruin turnip roots.

Turnips are a cool-season crop. They grow best when temperatures stay between 50°F and 65°F. In Kansas, that means you have two distinct planting windows. Get these windows right, and you will enjoy sweet, tender turnips. Get them wrong, and you get woody, bitter, or bolted roots.

The absolute best time to plant turnip in Kansas is in early spring, as soon as the soil can be worked, and again in late summer, about 6 to 8 weeks before the first expected frost. For most of Kansas, this means:

Spring planting: March 15 to April 15
Fall planting: August 1 to September 1

These dates vary slightly depending on your specific location in Kansas. Eastern Kansas (Zone 6a/6b) can plant a bit earlier in spring and later in fall. Western Kansas (Zone 5b/6a) should wait a little longer in spring and plant a bit earlier in fall.

Why Two Planting Seasons Work Best

Turnips hate heat. When soil temperatures go above 75°F, turnip roots become tough and pungent. The leaves may also bolt (go to seed) quickly. Kansas summers are hot and long, so a single spring planting will not last through summer. A fall planting, however, lets turnips mature in cooling weather, which actually makes them sweeter after a light frost.

Many gardeners make the mistake of planting turnips in May or June. This almost always fails. The roots get woody, and the greens taste bitter. Stick to the two-season plan for reliable results.

Spring Planting Details

For spring turnips, you want to plant as soon as the soil is dry enough to work. In Kansas, that is usually mid-March to early April. Soil temperature should be at least 40°F for seeds to germinate, though 50°F to 60°F is ideal.

Here is a step-by-step for spring planting:

Test your soil temperature with a soil thermometer. Wait until it reaches 40°F at a 2-inch depth.
Prepare the bed by loosening soil to 8-10 inches deep. Remove rocks and clumps.
Sow seeds 1/2 inch deep, 1 inch apart in rows 12-18 inches apart.
Water gently but thoroughly after planting.
Thin seedlings to 4-6 inches apart when they are 2-3 inches tall.
Harvest roots when they are 2-3 inches in diameter, usually 45-60 days after planting.

Spring turnips grow fast. You can start harvesting greens in as little as 30 days. The roots are ready in about 50-60 days. Do not let them sit in the ground too long, or they will get tough as the weather warms.

Fall Planting Details

Fall turnips are often sweeter than spring turnips. The cool nights and light frosts convert starches to sugars. For Kansas, the fall planting window is critical because you need the turnips to mature before a hard freeze.

Here is the fall planting schedule:

Count backward from your first average frost date. For most of Kansas, that is October 15-20.
Subtract 60-70 days (the maturity time for most turnip varieties).
Your planting window is roughly August 1 to September 1.
Sow seeds 1/2 inch deep, 1 inch apart, in rows 12-18 inches apart.
Water deeply after planting, as August soil is often dry.
Thin seedlings to 4-6 inches apart when they are 2-3 inches tall.
Mulch around plants to keep soil cool and moist.
Harvest after a light frost for the sweetest flavor.

Fall turnips can stay in the ground longer than spring turnips. You can harvest them after a hard freeze, but dig them up before the ground freezes solid. In Kansas, that usually means late November or early December.

Variety Selection Matters

Not all turnip varieties perform the same in Kansas. Some are better for spring, some for fall. Here are top picks:

Purple Top White Globe: Classic variety. Good for both spring and fall. Matures in 55 days.
Tokyo Cross: Fast-growing (35 days). Best for spring. Very sweet.
White Lady: Good for fall. Resists bolting. Matures in 50 days.
Seven Top: Grown mainly for greens. Good for spring planting.
Hakurei: Japanese salad turnip. Excellent for fall. Very tender.

For Kansas, choose varieties that mature in 50-60 days. This gives you a buffer against unexpected heat or cold. Avoid long-season varieties (70+ days) for spring planting, as they may not mature before heat arrives.

Soil Preparation Tips

Turnips grow best in loose, well-drained soil with a pH between 6.0 and 7.0. Kansas soil is often heavy clay or alkaline. Here is how to prepare:

Test your soil pH. Add lime if below 6.0, or sulfur if above 7.0.
Work in 2-3 inches of compost or aged manure to improve drainage.
Remove all rocks and debris. Turnip roots can deform if they hit obstacles.
Rake the bed smooth before planting.

Do not use fresh manure. It can cause forked or hairy roots. Stick to well-aged compost.

Watering And Care

Turnips need consistent moisture, especially during germination and root formation. In Kansas, spring rains often provide enough water, but fall plantings require regular irrigation.

Watering tips:

Keep soil evenly moist but not waterlogged.
Water 1 inch per week if rain is scarce.
Use drip irrigation or soaker hoses to avoid wetting leaves.
Mulch with straw or grass clippings to retain moisture and cool soil.

Inconsistent watering causes turnips to crack or become tough. If you let the soil dry out and then soak it, the roots may split. Keep a steady schedule.

Pest And Disease Management

Kansas turnips face a few common pests. Here is what to watch for:

Flea beetles: Small jumping bugs that eat holes in leaves. Use row covers or diatomaceous earth.
Aphids: Clusters on leaf undersides. Spray with neem oil or insecticidal soap.
Root maggots: White larvae that tunnel into roots. Rotate crops and use row covers.
Clubroot: A soil disease that causes swollen, distorted roots. Avoid planting where brassicas grew recently.

Rotate turnip planting locations each year. Do not plant turnips where cabbage, broccoli, or kale grew the previous season. This reduces disease risk.

Harvesting At The Right Time

Harvesting at the right size is key to flavor. Turnips get woody and pungent as they grow larger. Here is a guide:

Greens: Harvest outer leaves when 4-6 inches tall. Leave inner leaves to grow.
Spring roots: Harvest at 2-3 inches in diameter. Do not let them exceed 4 inches.
Fall roots: Can be harvested at 2-4 inches. Sweeter after a light frost.
Storage: Cut off greens, leave 1 inch of stem. Store in a plastic bag in the fridge for 2-3 weeks.

For fall turnips, you can leave them in the ground and harvest as needed. Cover with a thick layer of straw mulch to prevent freezing. In Kansas, this can extend harvest into December.

Common Mistakes To Avoid

Even experienced Kansas gardeners make these errors. Avoid them for better results:

Planting too late in spring. Turnips need cool weather to mature.
Planting too early in fall. August heat can kill young seedlings.
Overcrowding. Thin seedlings ruthlessly. Crowded turnips produce small, deformed roots.
Using too much nitrogen fertilizer. This makes huge leaves but small, hairy roots.
Ignoring soil pH. Alkaline soil leads to poor germination and stunted growth.

Succession Planting For Continuous Harvest

If you want a steady supply of turnips, try succession planting. For spring, plant a small batch every 2 weeks from March 15 to April 15. For fall, plant every 2 weeks from August 1 to September 1. This gives you a continuous harvest rather than one big glut.

Keep in mind that late spring plantings (after April 15) may bolt quickly. Stick to the early window for best results.

Climate Considerations For Different Kansas Regions

Kansas spans multiple hardiness zones. Here is a breakdown:

Eastern Kansas (Zone 6a/6b): Spring planting March 10-31. Fall planting August 10-September 5.
Central Kansas (Zone 6a): Spring planting March 15-April 5. Fall planting August 5-September 1.
Western Kansas (Zone 5b/6a): Spring planting April 1-15. Fall planting July 25-August 20.

Western Kansas has a shorter growing season and colder winters. Adjust your fall planting earlier to ensure turnips mature before hard freezes. Eastern Kansas has milder winters, so fall planting can extend a bit later.

Using Row Covers For Protection

Row covers are useful for both spring and fall planting. In spring, they protect seedlings from late frosts. In fall, they shield young plants from early heat waves. They also keep pests like flea beetles away.

Use lightweight floating row covers. Drape them over hoops or directly on the plants. Remove them when temperatures exceed 85°F, or when plants are well-established.

Companion Planting With Turnips

Turnips grow well with certain plants and poorly with others. Good companions include:

Peas and beans (fix nitrogen in soil)
Onions and garlic (deter pests)
Lettuce and spinach (similar growing conditions)
Mint and dill (attract beneficial insects)

Avoid planting turnips near:

Other brassicas (cabbage, broccoli, kale) – they share pests and diseases.
Potatoes – they compete for nutrients.
Strawberries – they can stunt turnip growth.

Fertilizing Turnips

Turnips are light feeders. Too much fertilizer, especially nitrogen, causes lush leaves but poor roots. Here is a simple fertilizing plan:

Before planting, mix in a balanced 10-10-10 fertilizer at 1 pound per 100 square feet.
Side-dress with a low-nitrogen fertilizer (like 5-10-10) when plants are 4 inches tall.
Avoid high-nitrogen fertilizers like blood meal or fish emulsion.

If your soil is rich in organic matter, you may not need any fertilizer. Over-fertilized turnips often have hairy, misshapen roots.

Storing Turnips For Winter

Kansas winters can be cold, but you can store turnips for months if done right. Here is how:

Harvest before a hard freeze (below 25°F).
Cut off greens, leaving 1 inch of stem.
Do not wash the roots. Brush off loose soil.
Store in a root cellar, basement, or refrigerator at 32-35°F with high humidity.
Pack in damp sand or sawdust to prevent shriveling.

Stored properly, turnips can last 3-4 months. Check periodically for soft spots and remove any that spoil.

Growing Turnips In Containers

If you have limited space, turnips grow well in containers. Use a pot at least 12 inches deep with drainage holes. Fill with loose, well-draining potting mix. Sow seeds 1/2 inch deep and thin to 4 inches apart. Water regularly, as containers dry out faster than ground soil.

Container turnips are great for patios or balconies. They also warm up faster in spring, so you can plant a week earlier than in-ground beds.

Turnip Greens: A Bonus Crop

Do not forget the greens. Turnip greens are nutritious and fast-growing. You can harvest them while waiting for roots to mature. Just take outer leaves, leaving the inner ones to keep growing. Greens are ready in 30-40 days.

For the best greens, plant varieties like Seven Top or Shogoin. These are bred specifically for leaf production, though they still produce small roots.

Frequently Asked Questions

Q: Can I plant turnips in Kansas in July?
A: It is not recommended. July is too hot for turnip germination and root development. Wait until August for fall planting.

Q: How late can I plant turnips in Kansas for fall harvest?
A: You can plant as late as September 1 in eastern Kansas, but August 15 is safer. Later plantings may not mature before a hard freeze.

Q: Do turnips need full sun in Kansas?
A: Yes, turnips need at least 6 hours of direct sunlight daily. Partial shade will result in smaller roots and leggy greens.

Q: What is the best turnip variety for Kansas clay soil?
A: Purple Top White Globe is very tolerant of clay soil. Amend with compost to improve drainage for best results.

Q: Can I plant turnips in Kansas after a frost?
A: Yes, fall turnips actually benefit from light frosts. They become sweeter. But protect them from hard freezes (below 25°F) with row covers or mulch.

Final Tips For Success

Turnips are one of the easiest crops for Kansas gardeners, as long as you time them right. Stick to the two-season plan: early spring and late summer. Prepare your soil well, water consistently, and harvest at the right size. With these steps, you will enjoy fresh, sweet turnips from your Kansas garden twice a year.

Remember that local conditions vary. Keep a garden journal to track your planting dates and results. Over time, you will fine-tune the perfect schedule for your specific microclimate. Happy planting!