Philodendron 'Winterbourn'

RHS Plant Profile
philodendron 'Winterbourn'

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Synonyms

Philodendron 'Xanadu' [1], Philodendron [Xanadu]

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

Position

Partial shade

Soil Types

Loam

Max Height

1-1.5 metres

Max Spread

1.5-2.5 metres

Size

Time to Maturity
10–20 years
Max Spread
1.5-2.5 metres
Max Height
1-1.5 metres

Growing Conditions

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

Position

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

Colour & Scent

Season Stem Flower Foliage Fruit
Spring
Summer
Autumn
Winter

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