Zone 5 gardeners should start turnips early enough to beat the first hard freeze. The best time to plant turnip in hardiness zone 5 is typically in early spring or late summer for a fall harvest. Turnips are cool-season crops that thrive when temperatures are between 50°F and 65°F.
Planting at the right time ensures sweet, tender roots rather than woody or bitter ones. In zone 5, your growing season is about 150 days long, so timing matters. You have two main windows: spring and fall.
Best Time To Plant Turnip In Hardiness Zone 5
For spring planting, aim for 2 to 4 weeks before your last expected frost date. In zone 5, that usually falls between April 15 and May 1. Soil temperatures should be at least 40°F for seeds to germinate.
For fall planting, count back 60 to 70 days from your first expected frost date. In zone 5, that first frost typically arrives between September 15 and October 1. So plant your fall turnips in late July or early August.
Spring Planting Window Details
Spring turnips grow fast but can get tough if temperatures spike. Plant as soon as the soil is workable in early April. Use a soil thermometer to check: 40°F is the minimum, but 50°F is ideal.
- Last frost date range: April 15 to May 1
- Planting window: March 25 to April 15
- Days to maturity: 45 to 60 days
- Harvest before summer heat arrives (late June)
If you plant too late, turnips may bolt or become woody. Spring turnips are best for quick salads or roasting.
Fall Planting Window Details
Fall turnips are often sweeter because cool temperatures convert starches to sugars. Plant 8 to 10 weeks before the first hard freeze. In zone 5, that means late July to mid-August.
- Count back 60 days from your first frost date (around September 20)
- Plant seeds 1/2 inch deep in moist soil
- Thin seedlings to 4 inches apart
- Water regularly during dry spells
- Mulch around plants to retain moisture
Fall turnips can handle light frosts, which actually improve flavor. Harvest after a few frosts for the sweetest taste.
Factors That Affect Planting Time
Your exact planting date depends on microclimate and variety. Some turnips mature in 35 days, while others need 60. Check your seed packet for days to maturity.
Soil Temperature
Turnip seeds germinate best when soil is between 50°F and 85°F. In cold spring soil, germination can take 2 weeks. In warm fall soil, it may take only 5 days.
Use a soil thermometer to avoid guessing. If soil is below 40°F, wait. If above 85°F, wait for cooler weather.
Frost Dates
Know your zone 5 frost dates. The average last spring frost is around April 20. The average first fall frost is around September 25. But these are averages, not guarantees.
- Check your local extension office for precise dates
- Watch weather forecasts for late frosts in spring
- Use row covers to protect young plants from unexpected cold
Turnip Variety Selection
Different varieties have different maturity times. For spring, choose fast-maturing types like ‘Purple Top White Globe’ or ‘Tokyo Cross’. For fall, try ‘Hakurei’ or ‘Golden Ball’.
Fast varieties mature in 35 to 45 days. Slower ones take 55 to 70 days. Match your variety to your season length.
Step-By-Step Planting Guide
Follow these steps for a sucessful turnip crop in zone 5. Each step is simple but important.
Prepare The Soil
Turnips need loose, well-draining soil with a pH between 6.0 and 7.5. Remove rocks and clods that can deform roots. Work in 2 inches of compost before planting.
- Test soil pH with a home kit
- Add lime if pH is below 6.0
- Rake soil smooth and level
- Remove any debris or weeds
Sow The Seeds
Sow seeds 1/2 inch deep and 1 inch apart in rows 12 to 18 inches apart. Cover lightly with soil and water gently. Keep soil moist until seeds germinate.
- Spring: sow in early April
- Fall: sow in late July to mid-August
- Succession plant every 2 weeks for continuous harvest
Thin Seedlings
When seedlings are 2 inches tall, thin them to 4 inches apart. Thinning prevents overcrowding and allows roots to develop fully. Eat the thinnings in salads.
If you skip thinning, you will get small, misshapen turnips. Be firm but gentle when pulling extras.
Water And Mulch
Turnips need consistent moisture, about 1 inch per week. Water deeply once a week rather than shallowly daily. Mulch with straw or grass clippings to retain moisture and suppress weeds.
Inconsistent watering can cause cracked roots. Keep soil evenly moist, especially during dry spells.
Harvest At The Right Time
Harvest spring turnips when roots are 1 to 2 inches in diameter, usually 45 to 60 days after planting. Fall turnips can be left longer, up to 3 inches, but harvest before a hard freeze.
Pull them gently from the soil. Cut off greens leaving 1 inch of stem. Store roots in a cool, dark place for up to 2 months.
Common Mistakes To Avoid
Even experienced gardeners make errors. Here are the most common turnip planting mistakes in zone 5.
Planting Too Late In Spring
If you plant turnips in May, summer heat will make them bitter and woody. Stick to early April planting for spring crops.
Planting Too Early In Fall
Planting fall turnips in July is fine, but if you plant in June, they may mature during hot weather. Wait until late July or August.
Overcrowding
Seeds are tiny, so it is easy to sow too thickly. Thin ruthlessly to 4 inches apart. Crowded turnips produce tiny roots.
Ignoring Soil Quality
Turnips need loose soil. Heavy clay or rocky soil causes forked or stunted roots. Amend with compost or grow in raised beds.
Neglecting Water
Turnips are 90% water. Drought stress makes roots tough and bitter. Water consistently, especially during germination and root bulking.
Seasonal Care Tips
Turnips are low-maintenance but benefit from a few simple care steps. Follow these tips for each season.
Spring Care
After planting, watch for flea beetles and aphids. Use row covers to protect young plants. Fertilize lightly with a balanced fertilizer at planting time.
- Water weekly if rain is scarce
- Weed regularly to reduce competition
- Harvest promptly when roots reach size
Fall Care
Fall turnips need less water as temperatures drop. Mulch heavily to protect roots from early frosts. Leave them in the ground after light frosts for sweeter flavor.
If a hard freeze is forecast, harvest all remaining turnips. They can be stored in a root cellar or refrigerator.
Frequently Asked Questions
Can I plant turnips in zone 5 in July?
Yes, late July is ideal for fall turnips. Plant 8 to 10 weeks before the first frost for a sweet harvest.
What is the best turnip variety for zone 5?
Purple Top White Globe is reliable. For sweeter roots, try Hakurei or Tokyo Cross. All mature in 45 to 55 days.
How late can I plant turnips in zone 5?
You can plant as late as mid-August for fall harvest. Any later and roots may not mature before a hard freeze.
Do turnips need full sun in zone 5?
Yes, turnips need at least 6 hours of direct sun daily. Partial shade can result in smaller roots.
Can I grow turnips in containers in zone 5?
Yes, use containers at least 12 inches deep. Choose small varieties like ‘Hakurei’ for best results.
Final Thoughts On Planting Turnips In Zone 5
Planting turnips at the right time makes all the difference. For spring, start in early April. For fall, plant in late July or early August. Always check your local frost dates and soil temperature.
Turnips are forgiving and fast-growing. Even if you miss the ideal window, you can often squeeze in a late planting. Just remember to harvest before extreme heat or hard freeze.
With proper timing, you will enjoy sweet, tender turnips from your zone 5 garden. Experiment with different varieties and planting dates to find what works best for your microclimate.