Root vegetables
25-30days to harvest
4-7days to germinate
Z2–11USDA zones
Easydifficulty
F1 hybridContainer friendly

Sowing

Direct sow 2-4 weeks before last frost and again in late summer. Plant seeds ½ inch deep, thin to proper spacing.

Cultivation

Sun
Full sun to partial shade (4-8 hours)
Water
½-1 inch per week, consistent moisture
Soil
Well-drained, loose soil with good organic matter
Soil pH
6.0-7.0
Spacing
1-2 inches
Height
0-3 feet
Season
Cool season

Appearance & flavour

Colour
Deep purple skin with bright white flesh
Size
1-1.5 inches diameter
Shape
Round, globe-shaped
Flavour
Mild, sweet, and crisp with less bite than traditional radishes

In the kitchen

Fresh eating, salads, garnish, pickling. Beautiful when sliced to show purple and white contrast.

Pests, disease & resistance

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

Planting calendar by USDA zone

ZoneStart indoorsTransplantDirect sowHarvest
1——June – JulyJune – September
2——May – JulyJune – September
3——May – JuneMay – October
4——April – JuneMay – October
5——April – MayMay – November
6——April – MayApril – November
7——March – MayApril – November
8——March – AprilMarch – December
9——February – MarchFebruary – December
10——January – MarchFebruary – December
11——January – FebruaryJanuary – December
12——January – FebruaryJanuary – December
13——January – FebruaryJanuary – December

Companion planting

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

LettuceQuick-growing leaves provide shade for radish roots and help retain soil moisture
CarrotsRoot zones don't compete as carrots grow deeper, and radishes help break up soil for carrot growth
SpinachCool-season companion that shares similar growing conditions and harvest timing
ChivesNatural pest deterrent that repels aphids and flea beetles that commonly attack radishes
NasturtiumsActs as trap crop for flea beetles and aphids, protecting radish foliage
MarigoldsRepels root maggots and other soil pests that can damage radish roots
PeasFixes nitrogen in soil and provides natural support structure without competing for root space
CucumberRadishes help deter cucumber beetles and can be harvested before cucumbers need full space

Avoid

HyssopAllelopathic compounds inhibit radish germination and early growth
Brussels SproutsBoth are brassicas competing for same nutrients and susceptible to similar pests and diseases
TurnipsSame plant family with identical pest and disease issues, creating concentrated infestations

Nutrition (per 100 g)

Calories (per 100 g)
16
Protein (g)
0.68
Fat (g)
0.1
Carbohydrate (g)
3.4
Fibre (g)
1.6
Sugars (g)
1.86
Vitamin A (µg)
0
Vitamin C (mg)
14.8
Vitamin E (mg)
0
Vitamin K (µg)
1.3
Vitamin B6 (mg)
0.071
Folate (µg)
25
Calcium (mg)
25
Iron (mg)
0.34
Magnesium (mg)
10
Phosphorus (mg)
20
Potassium (mg)
233
Zinc (mg)
0.28
Selenium (µg)
0.6

Where to buy seed and equipment

Some links are affiliate links. If you buy through them we may earn a commission at no extra cost to you.

Growing it? There is a full cultivation guide at the root vegetables 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 Plum Radish?

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

Similar varieties

Other root vegetables with a comparable time to harvest, so a season that suits Purple Plum Radish suits these too.

Browse all 56 root vegetables