Apium graveolens var. rapaceum 'Ilona'

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<em>Apium</em> <em>graveolens</em> var. <em>rapaceum</em> 'Ilona' RHS
Annual Biennial

A reliable quick-maturing variety of celeriac, producing large round heads and which resists bolting

Position

Full sun

Soil Types

Loam, Sand

Max Height

0.1-0.5 metres

Max Spread

0.1-0.5 metres

Size

Time to Maturity
1–2 years
Max Spread
0.1-0.5 metres
Max Height
0.1-0.5 metres

Growing Conditions

Loam Sand
Moisture
Moist but well–drained
pH
Acid or Alkaline or Neutral

Position

Full sun
Aspect
East–facing or North–facing or 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)
H4

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

Botanical Details

Family
Apiaceae
Native to GB/Ireland
No
Foliage
Semi evergreen
Habit
Tufted
Potentially harmful
Harmful to skin with sunlight. Wear gloves and other protective equipment when handling
Genus
Apium can be annual, biennial or perennial herbaceous plants, with leaves divided into three leaflets, or pinnate; in summer, tiny white flowers are borne in umbels
Name Status
Accepted

How to Grow

Cultivation

Grow in well-drained but constantly moist soil in good light. For more advice see celeriac cultivation

Propagation

Propagate by seed. See sowing vegetable seeds or sowing seeds indoors for further advice

Pruning

No pruning required

Pests

May be susceptible to carrot fly and celery leaf-mining fly

Diseases

May be susceptible to celery leaf spot