Brassica oleracea (Gongylodes Group) 'Korist'

RHS Plant Profile

kohlrabi 'Korist'

Annual Biennial

A hardy biennial grown as an annual vegetable. A globe shaped green variety with a white flesh that is juicy and has a mild, sweet flavour. It has a long holding ability and shows excellent resistance to downy mildew

Position

Full sun

Soil Types

Loam, Sand, Chalk

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity: 1 year
Max Spread: 0.1-0.5 metres
Max Height: 0.1-0.5 metres

Growing Conditions

Loam Sand Chalk

Moisture: Well–drained
pH: Alkaline or Neutral

Position

Full sun

Aspect: South–facing or West–facing
Exposure: Sheltered
Hardiness

Hardiness Ratings

All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets

H1A: under glass all year (>15C)
H1B: can be grown outside in the summer (10 - 15)
H1C: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20): H3

Colour & Scent

Season	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family: Brassicaceae
Native to GB/Ireland: No
Foliage: Deciduous
Habit: Clump forming
Genus: Brassicas can be annual, biennial or perennial plants, most are upright with alternate, often glaucous leaves, long taproots and clusters of cross-shaped, yellow or white flowers. The genus includes a number of species bred to produce food crops, such as cabbages, turnips, mustards and oilseed rape, as well as others grown for their ornamental value
Name Status: Accepted

How to Grow

Cultivation

Grow in light, non-acid, free draining soil in full sun. Green varieties can be sown early. Sow seed direct from March to July, 1.5cm deep in drills 30cm apart, thin out to 15cm between each plant. Or start indoors and transplant out in May-June. See Vegetable Cultivation

Propagation

Propagate by seed. See sowing vegetable seeds

Pruning

No pruning required

Pests

May be susceptible to birds, cabbage caterpillars, cabbage whitefly, cabbage root fly, cutworms, flea beetle, slugs and snails

Diseases

May be susceptible to black rot, club root and leaf spot