Winterbourn Philodendron
Sources last read 14 September 2026.
Not yet rated How forgiving it is has not been judged here yet.
Also called Xanadu Philodendron.
Winterbourn Philodendron is toxic
- Not assessed for cats. This plant is not on the ASPCA list. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.
- Not assessed for dogs. This plant is not on the ASPCA list. That is not a finding of safety: none of the sources read for this site gives an answer either way. Treat it as unknown.
- Toxic to people. Harmful when eaten; irritates skin and eyes and can cause allergy. Use gloves and protective gear when handling it. RHS
What the sources say about its care
Sources file this plant under other names: Philodendron 'Winterbourn' XANADU. Citations below point at the name its source uses.
- Light
- Partial shadeRHS · read 13 September 2026
- Water
- Moist but well-drainedRHS · read 13 September 2026
- Humidity
No source read publishes a humidity figure for any plant on this site. What follows is general guidance for foliage plants.
ASHRAE recommends indoor relative humidity between 30% and 60% 30–60%Penn State Extension · read 13 September 2026- Temperature
How cold this tolerates, not what it prefers. No source read for this site publishes a preferred range for a plant indoors.
H1A — warmer than 15°C 15 °CRHS · read 13 September 2026- Soil
- Loam; pH Acid or Alkaline or NeutralRHS · read 13 September 2026
- Toxic to cats
- Not on the ASPCA list. That is not a finding of safety.ASPCA · read 13 September 2026
- Toxic to dogs
- Not on the ASPCA list. That is not a finding of safety.ASPCA · read 13 September 2026
- Harmful to people
- Harmful when eaten; irritates skin and eyes and can cause allergy. Use gloves and protective gear when handling it.RHS · read 13 September 2026
Routine care
- Watering
- During growth, water moderately and feed monthly with a balanced liquid fertiliser. At other times water sparingly.RHS · read 13 September 2026
- Feeding
- While growing, water moderately and feed monthly with a balanced liquid fertiliser.RHS · read 13 September 2026
- Repotting
- Plants in containers may need a new pot every 1 to 2 years.NC State Extension · read 13 September 2026
- Propagation
- In spring, layer the stems, or scatter seed on the surface and keep it between 19 and 24 °C.RHS · read 13 September 2026
- Pruning
- Regular pruning is not needed, but thin the plant if it becomes crowded or too big, and take off dead or yellowing leaves.RHS · read 13 September 2026
- Pests and diseases
- Can be troubled by banded greenhouse thrips.NC State Extension · read 13 September 2026Glasshouse red spider mite and scale insects can attack it. Disease is uncommon.RHS · read 13 September 2026
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Photographs
About the plant
- Native range
- S. Brazil to ParaguayWorld Checklist of Vascular Plants, June 2026 release, CC BY.Kew WCVP · read 13 September 2026southern Brazil & ParaguayNC State Extension · read 13 September 2026Brazil and ParaguayRHS · read 13 September 2026
- Climate
- seasonally dry tropicalWorld Checklist of Vascular Plants, June 2026 release, CC BY.Kew WCVP · read 13 September 2026
- Growth form
- subshrubWorld Checklist of Vascular Plants, June 2026 release, CC BY.Kew WCVP · read 13 September 2026Herbaceous Perennial; habit dense, mounding, spreadingNC State Extension · read 13 September 2026Clump forming (evergreen)RHS · read 13 September 2026
- Size
- Height 36–60 in; width 36–60 inNC State Extension · read 13 September 2026Height 1-1.5 metres; spread 1.5-2.5 metres after 10–20 yearsRHS · read 13 September 2026
- Flowering
- Flowers cream/tan, red/burgundy, whiteNC State Extension · read 13 September 2026Flowers red in summerRHS · read 13 September 2026
Other Philodendron
Heartleaf philodendronA thin dry rim that crumbles between the fingers
Blushing PhilodendronSourced care, difficulty not yet judged
- No photograph yetPhilodendron angustisectumSourced care, difficulty not yet judged
Philodendron elegansSourced care, difficulty not yet judged
- No photograph yetPhilodendron mexicanumSourced care, difficulty not yet judged
Silver Sword PhilodendronSourced care, difficulty not yet judged
More of the Araceae family
Arrowhead plantEdges of the leaf blades brown while the middle stays sound
Calla lilyEdges of the leaves brown while the middle stays sound
Dumb caneLeaf tips go crisp and brown
Elephant earCrisp margins that appear in winter
Flamingo flowerBrown brittle margins with a green centre
MonsteraBrown brittle margins with a green centre
Plants with similar care
AcajouSourced care, difficulty not yet judged
Acorus gramineusSourced care, difficulty not yet judged
Alberta Prayer PlantSourced care, difficulty not yet judged
- No photograph yetAlocasia azlaniiSourced care, difficulty not yet judged
- No photograph yetAlocasia lauterbachianaSourced care, difficulty not yet judged
Alocasia micholitzianaSourced care, difficulty not yet judged
Sources
- ASPCA · read 13 September 2026
- Kew WCVP · read 13 September 2026
- NC State Extension · read 13 September 2026
- Penn State Extension · read 13 September 2026
- RHS · read 13 September 2026
What this does not cover
The figures above are what published sources say, not measurements of the plant in your room. They say nothing about your pot size, your water, the season, or how far from the glass the plant stands, and those decide more than any figure here does.
Humidity has no species figure because no source read for this site publishes one, and the only temperature published for this plant is a cold floor. The simulator fills those gaps with general figures for its kind of plant, marked as general and listed on how we read sources. Where a toxicity row says the plant was not assessed, that is the absence of a finding and not a finding of safety.
If something is already wrong, the diagnosis tool asks about the soil, the window and the watering, which is where the answer usually is.