Brassicas
37days to harvest
4-7days to germinate
Z5–11USDA zones
Easydifficulty
HeirloomContainer friendly

Sowing

Direct sow seeds ½ inch deep in early spring or late summer. Thin seedlings to proper spacing when 2-3 inches tall.

Cultivation

Sun
Full sun to partial shade (4-8 hours)
Water
High — consistent moisture needed
Soil
Loose, well-drained soil with good organic matter
Soil pH
6.0-7.0
Spacing
4-6 inches
Height
3 feet
Season
Warm season annual

Appearance & flavour

Colour
White root with purple top shoulders
Size
8-10"
Shape
Round globe shape with tapering root
Flavour
Mild, sweet, slightly peppery when young, sweeter after frost

In the kitchen

Roasting, mashing, soups, stews, pickling. Young greens excellent in salads and stir-fries.

Pests, disease & resistance

Pests
Flea beetles, cabbage root maggots, aphids
Diseases
Clubroot, black rot, downy mildew
Resistance
Good resistance to clubroot and downy mildew

Planting calendar by USDA zone

ZoneStart indoorsTransplantDirect sowHarvest
1April – MayJune – JulyJune – JulyJuly – September
2April – MayJune – JulyMay – JulyJune – September
3March – AprilMay – JuneMay – JuneJune – October
4March – AprilMay – JuneApril – JuneJune – October
5February – MarchApril – MayApril – MayMay – November
6February – MarchApril – MayApril – MayMay – November
7February – MarchApril – MayMarch – MayApril – November
8January – FebruaryMarch – AprilMarch – AprilApril – December
9JanuaryFebruary – MarchFebruary – MarchMarch – December
10JanuaryFebruary – MarchJanuary – MarchFebruary – December
11JanuaryJanuary – FebruaryJanuary – FebruaryJanuary – December
12JanuaryJanuary – FebruaryJanuary – FebruaryJanuary – December
13JanuaryJanuary – FebruaryJanuary – FebruaryJanuary – December

Companion planting

8 beneficial pairings indexed for this variety, 3 to avoid.

NasturtiumsActs as trap crop for flea beetles and aphids, protecting turnip leaves
OnionsRepels root maggots and cabbage worms that commonly attack brassicas
GarlicDeters aphids, cabbage loopers, and other brassica pests with strong scent
MarigoldsRepels flea beetles and nematodes while attracting beneficial insects
RadishesQuick-growing companion that loosens soil and may deter root flies
LettuceProvides ground cover, conserves moisture, and has similar growing requirements
DillAttracts beneficial wasps that prey on cabbage worms and aphids
CarrotsDifferent root depths prevent competition and carrots may improve soil structure

Avoid

TomatoesMay stunt turnip growth and compete for nutrients, different pH preferences
StrawberriesBoth are heavy feeders competing for nutrients, may inhibit turnip root development
SunflowersAllelopathic compounds can inhibit brassica growth and development

Nutrition (per 100 g)

Calories (per 100 g)
28
Protein (g)
0.9
Fat (g)
0.1
Carbohydrate (g)
6.43
Fibre (g)
1.8
Sugars (g)
3.8
Vitamin A (µg)
0
Vitamin C (mg)
21
Vitamin E (mg)
0.03
Vitamin K (µg)
0.1
Vitamin B6 (mg)
0.09
Folate (µg)
15
Calcium (mg)
30
Iron (mg)
0.3
Magnesium (mg)
11
Phosphorus (mg)
27
Potassium (mg)
191
Zinc (mg)
0.27
Selenium (µg)
0.7

Where to buy seed and equipment

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Growing it? There is a full cultivation guide at the brassicas growing guide.

Cultivar facts compiled from public horticultural references including USDA GRIN and NC State Extension. Descriptions are original to this catalogue.

DarkGrow forum

Grown Purple Top Turnip?

Post a crop report — day counts, reservoir readings, what worked. Variety-specific logs are the most useful thing on the forum.

Similar varieties

Other brassicas with a comparable time to harvest, so a season that suits Purple Top Turnip suits these too.

Browse all 79 brassicas