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Herbaceous Perennial

Philodendron 'Winterbourn'

philodendron 'Winterbourn'

An upright, tender perennial with glossy, lobed, dark green leaves and occasional red flowers

Synonyms

Philodendron 'Xanadu'
Philodendron Xanadu

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Ultimate height

1–1.5 metres

Time to ultimate height

10–20 years

Ultimate spread

1.5–2.5 metres

Loam

Moisture

Moist but well–drained

pH

Acid, Alkaline, Neutral

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Partial shade

Aspect

South–facing or East–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)

H1A

Botanical details

Family: Araceae
Native to GB / Ireland: No
Foliage: Evergreen
Habit: Columnar upright, Clump forming
Potentially harmful: Harmful if eaten, skin/eye irritant/allergen. Wear gloves and other protective equipment when handling Pets: Harmful if eaten, skin/eye irritant/allergen - For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Genus: Philodendron can be shrubs, trees or climbers, with glossy, leathery, evergreen, simple to pinnately divided leaves, and tiny flowers borne within arum-like white, green or reddish spathes
Name status: Accepted

How to grow

Cultivation

Grow under glass in a peat-free, loam-based potting compost in bright filtered light with shade from hot sun, mist daily. When in growth water moderately and apply a balanced liquid fertilizer monthly. Water sparingly at other times. See Philodendron and houseplant cultivation for further advice

Propagation

Propagate by seed surface sown at 19 to 24 °C in spring or layer in spring

Suggested planting locations and garden types

Architectural
Sub-tropical

Pruning

Pruning group 11, in spring

Pests

May be susceptible to scale insects and glasshouse red spider mite

Diseases

Generally disease-free

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