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Herbaceous PerennialConservatory Greenhouse

Manihot grahamii

Fast-growing, sub-tropical, woody-stemmed perennial native to South America, about 2-3m tall, with deeply-lobed, intricately-cut, palmate rich green leaves and clusters of waxy red-striped, pale green bell-shaped flowers in summer. It is closely related to the edible tapioca

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Ultimate height

1.5–2.5 metres

Time to ultimate height

1–2 years

Ultimate spread

1–1.5 metres

Loam

Moisture

Well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun
Partial shade

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)

Botanical details

Family: Euphorbiaceae
Native to GB / Ireland: No
Foliage: Deciduous or Semi evergreen
Habit: Spreading branched
Name status: Correct

How to grow

Cultivation

In mild or frost-free counies, grow in any free-draining soil in full sun with shelter. In frost-prone areas, grow in a cool greenhouse, in a mix of peat-free potting compost and grit, in full light and with low humidity. Water moderately during the growing season, sparingly in winter

Propagation

Propagate by seed or softwood cuttings (stem cuttings)

Suggested planting locations and garden types

City and courtyard gardens
Coastal
Cottage and informal garden
Mediterranean climate plants
Patio and container plants
Sub-tropical
Conservatory and greenhouse

Pruning

No pruning required. Cut down any dead or damaged foliage in early spring

Pests

May be susceptible to aphids, glasshouse red spider mite or glasshouse whitefly if grown under glass

Diseases

Generally disease-free

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