Overview
Philodendron 'Imperial Red' is a columnar upright conservatory greenhouse in the genus Philodendron, part of the Araceae family, with evergreen foliage. It typically grows around 1-1.5 metres tall and 0.5-1 metres wide, reaching full size in around 2-5 years. Philodendron 'Imperial Red' grows best in partial shade, and tolerates loam soils and any pH. Its UK hardiness is rated H1a. Suggested uses include indoor ornamental.
About
Philodendron 'Imperial Red' is a cultivar of the Philodendron genus, known for its columnar upright habit and evergreen foliage. It typically grows to a height of 1 to 1.5 metres with a spread of 0.5 to 1 metre, reaching full size within 2 to 5 years. Suited to conservatories, greenhouses, or as a houseplant, it thrives in partial shade with a south, east, or west-facing aspect and prefers sheltered conditions. The plant grows best in moist but well-drained loam soils, tolerant of acid, alkaline, and neutral pH levels, and is particularly attractive during the winter season.
About the genus
Philodendron is a large genus of flowering plants in the family Araceae. As of September 2025, the Plants of the World Online accepted 625 species; other sources accept different numbers. Regardless of number of species, the genus is the second-largest member of the family Araceae, after genus Anthurium.
Wikipedia contributors, "Philodendron", CC BY-SA 4.0 — Philodendron
Growing conditions
Best soil and position for Philodendron
- Sunlight
- Partial shade
- Soil type
- Loam
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing, East-facing, West-facing
- Exposure
- Sheltered
- UK hardiness
- H1a
Plant details
Philodendron 'Imperial Red' size, habit and characteristics
- Plant type
- Conservatory Greenhouse, Houseplants
- Habit
- Columnar upright
- Foliage
- Evergreen
- Height
- 1-1.5 metres
- Spread
- 0.5-1 metres
- Time to full height
- 2-5 years
- Suggested uses
- Indoor ornamental
Care notes
Pruning and caring for Philodendron 'Imperial Red'
- Propagation
- Stem cuttings
- Pest resistance
- Generally pest-free
- Disease resistance
- Generally disease-free
Frequently asked questions
Where is the best place to plant Philodendron 'Imperial Red'?
Philodendron 'Imperial Red' prefers partial shade. It suits sheltered positions.
What soil does Philodendron 'Imperial Red' need?
Philodendron 'Imperial Red' grows best in loam soil. It is happy in soil of any pH. Aim for soil that stays moist but well-drained.
How big does Philodendron 'Imperial Red' grow?
Philodendron 'Imperial Red' reaches a height of 1-1.5 metres and a spread of 0.5-1 metres. It takes around 2-5 years to reach full size.
Is Philodendron 'Imperial Red' hardy in the UK?
Philodendron 'Imperial Red' has an RHS hardiness rating of H1a, meaning it needs tropical warmth above 15°C and must be grown under glass in the UK.
How do I propagate Philodendron 'Imperial Red'?
Stem cuttings.