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SuNutri
Turnips
Beginner

Turnips

Brassica rapa subsp. rapa

Family: Brassicaceae

Turnips are fast-growing root vegetables providing both tasty roots and nutritious greens. The white or purple-topped roots have a mild, slightly sweet flavor when harvested young. Often overlooked, turnips deserve a place in every garden.

Days to Harvest

35-60 days

Sun Needs

Full Sun to Partial Shade (4-6 hours)

Water Needs

moderate

Germination Temp

65°F optimal

Seed Starting

Start Indoors

0 weeks before last frost

Germination

3-7 days

Seed Depth

1/4 to 1/2 inch

Light to Germinate

No

đź’ˇ Tip: Direct sow only. Can be planted in spring and again in late summer for fall harvest. Fall crop is sweeter.

Growing Conditions

Soil Type

Loose, well-draining soil

pH Range

6 - 7.5

Spacing

4-6 inches between plants, 12-18 inches between rows

Companion Plants
âś“ Peasâś“ Beansâś“ Onions

⚠️ Avoid planting near:

âś— Other brassicasâś— Potatoes
History & Nutrition

History

Before potatoes conquered Europe, turnips reigned supreme as the humble sustenance of peasants, livestock, and even kings—a 4,000-year history that spans from ancient Persia to the highlands of Scotland. The turnip's origins remain debated, with some botanists pointing to Central Asia or Siberia and others to the Mediterranean, but wild turnips (Brassica rapa) have been gathered since prehistoric times. Ancient Greek and Roman writers mentioned turnips extensively; Pliny described both round and flat varieties, and the vegetable appeared in Apicius's Roman cookbook. When the Roman Empire fell, turnips became the survival food of medieval Europe, providing both food for humans and fodder for livestock through harsh winters. In Scotland and Ireland, turnips were integral to Celtic celebration of Samhain—the original jack-o'-lanterns were carved from turnips before Irish immigrants discovered America's larger, easier-to-carve pumpkins. The expression "blood from a turnip" dates to the 17th century, reflecting the vegetable's association with poverty and bare sustenance. The "Turnip Winter" of 1916-1917 in Germany saw the root vegetable become practically the only food available as wartime blockades cut off other supplies—an estimated 700,000 Germans died from starvation and disease. Japanese hakurei turnips, developed in the 20th century, revolutionized how Western palates perceive turnips, offering a sweet, mild flavor suitable for raw eating. Southern American cuisine embraced turnip greens as much as the roots, slow-cooked with smoked ham hock as soul food. Today, turnips are experiencing a culinary renaissance as chefs rediscover heirloom varieties and showcase their sweet, mild flavor when harvested young—a far cry from the tough, bitter roots of historical necessity.

Nutritional Benefits

  • âś“Low in calories
  • âś“Good source of Vitamin C
  • âś“Contains fiber
Climate & Temperature

Optimal Growing Temp

50°F - 65°F

Turnips grow best in cool weather between 50-65°F. Frost improves sweetness. Heat causes woody, bitter roots.

Survival Range

25°F - 80°F

Can survive these temperatures

hardy
cool Season

Frost Note: Turnips tolerate frost down to 20-25°F. Light frost sweetens the roots. Can overwinter in mild climates with mulch.

Best USDA Zones

Zone 3Zone 4Zone 5Zone 6Zone 7Zone 8

Humidity

50-70%

Moderate humidity is fine. Excessive moisture can promote fungal issues.

Plant Size & Growth

Height

12-18 inches

Spread

6-8 inches

Growth Habit

rosette

biennialRoot Depth: Shallow root system (6-12 inches). Globe-shaped varieties need loose soil 4-6 inches deep.
Growth Stages

Germination

3-10 days

Turnip seeds germinate quickly—as fast as 3 days in warm soil. First seed leaves (cotyledons) emerge.

Seedling Stage

Duration: 2-3 weeks

True leaves: First true leaves are slightly fuzzy and broader than seed leaves

Transplant ready: Turnips should be direct sown—they don't transplant well due to taproot.

Vegetative Growth

Duration: 4-8 weeks depending on variety

Plants produce nutritious greens while the root swells underground. Both are edible.

Harvest Maturity

Timing: 30-60 days from seed depending on variety

  • Root shoulders visible at soil line (1-3 inches diameter)
  • Roots are firm when gently squeezed
  • Harvest before roots become woody
  • Smaller roots (2-3 inches) are most tender
Expected Yield

Per Plant

1 root per plant (4-12 oz) plus edible greens

Per Square Foot

9 turnips per square foot with 4-inch spacing

Harvest Frequency

Harvest as needed once roots reach usable size

Factors Affecting Yield

  • •Variety selection—early varieties for fast harvest, storage types for larger roots
  • •Growing temperature—heat causes woody, bitter roots
  • •Consistent moisture for tender texture
  • •Thinning—crowded turnips stay small
Watering Guide

Seedling Stage

Keep soil consistently moist for quick germination

Established Plants

About 1 inch per week for tender roots

During Fruiting

Maintain consistent moisture—irregular watering causes cracking

Preferred Method

Drip irrigation or soaker hoses. Avoid overhead watering which promotes disease.

⚠️ Critical Watering Periods

  • • Root development phase

Pro Tips

  • Consistent moisture is key for tender, mild flavor
  • Mulch to maintain even soil moisture
  • Water stress causes woody, bitter roots
Fertilizing Guide
light feederRecommended: Low nitrogen (5-10-10) to promote roots over greens

Feeding Schedule

Soil preparation

Compost worked into soil

Once before planting

Growing

Side-dress with compost if needed

Once at 3-4 weeks if growth is slow

Organic Options

CompostWood ash (potassium)GreensandRock phosphate

Work compost into soil before planting. Avoid fresh manure which causes forked roots.

Container Growing
âś“ Suitable for containers

Minimum Size

8 inches deep, 12-inch diameter

Recommended Size

10-12 inches deep for full-size turnips

Depth Required

At least 8 inches for globe varieties

Best Varieties for Containers

HakureiTokyo CrossScarlet Queen

Container Tips

  • Use well-draining potting mix
  • Space 3-4 inches apart
  • Keep consistently moist
  • Harvest when small for best flavor
Succession Planting

Plant Every

Every 2-3 weeks

Sowings/Season

4-6 plantings

Duration

Spring through fall (skip hot midsummer)

Tips

  • Plant in early spring and again in late summer for fall harvest
  • Fall plantings produce sweeter roots
  • Skip midsummer when temperatures exceed 80°F
Frequently Asked Questions

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