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BeddingConservatory Greenhouse

Zantedeschia 'Black Magic'

arum lily 'Black Magic'

A compact, clump-forming, tuberous perennial to 45cm high with wavy-edged, upright green leaves flecked with white, and bright yellow flowers with black throats which appear from summer to early autumn. May be grown as a house or conservatory plant or as a summer patio plant

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Ultimate height

0.1–0.5 metres

Time to ultimate height

2–5 years

Ultimate spread

0.1–0.5 metres

Clay

Loam

Moisture

Moist but well–drained, Poorly–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

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)

H1C

Botanical details

Family: Araceae
Native to the UK: No
Foliage: Deciduous
Habit: Bushy
Potentially harmful: Harmful if eaten, skin/eye irritant. Wear gloves and other protective equipment when handling. Pets: Harmful if eaten, skin/eye irritant - for further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Zantedeschia can be deciduous or semi-evergreen, tuberous perennials with lance-shaped or arrow-shaped leaves and tiny yellow flowers forming a dense spike-like spadix, with a showy, hood-like spathe, sometimes followed by orange berry-like fruits
Name status: Accepted

How to grow

Cultivation

Plant tubers in loam-based compost in spring. Plants may be grown under glass all year, at a minimum of 10°C; alternatively use as bedding plants in summer once all risk of frost has passed. Keep well-watered in the growing season. Bring outdoor pots indoors, or lift and store tubers in a frost-free place, in autumn. See Zantedeschia cultivation

Propagation

Propagate by division in spring

Suggested planting locations and garden types

Houseplants
Patio and container plants
Sub-tropical
Bedding
Conservatory and greenhouse
Cut flowers

Pruning

Remove the flowers as they start to fade, pulling the entire stem out at the base

Pests

May be susceptible to glasshouse red spider mite

Diseases

May be susceptible to fungal and bacterial rots and a virus

Get involved

The Royal Horticultural Society is the UK’s leading gardening charity. We aim to enrich everyone’s life through plants, and make the UK a greener and more beautiful place.