Overview
Dioon spinulosum is a tufted palms in the genus Dioon, part of the Zamiaceae family, with evergreen foliage. Dioon spinulosum grows best in full sun, and tolerates loam soils and neutral pH. Its UK hardiness is rated H1b. Suggested uses include patio and container plants, sub-tropical and low maintenance. It is native to Mexico Gulf and Mexico Southwest.
About
Dioon spinulosum, giant dioon or spiny dioon, is a cycad endemic to limestone cliffs and rocky hillsides in the tropical rainforests of Veracruz and Oaxaca, Mexico. It is one of the tallest cycads in the world, growing to 16 meters in height.
Growing conditions
Best soil and position for Dioon
- Sunlight
- Full sun
- Soil type
- Loam
- Soil pH
- Neutral
- Soil moisture
- Moist but well-drained
- Aspect
- South-facing
- Exposure
- Sheltered
- UK hardiness
- H1b
Plant details
Dioon spinulosum size, habit and characteristics
- Plant type
- Palms
- Habit
- Tufted
- Foliage
- Evergreen
- Suggested uses
- Patio and container plants, Sub-tropical, Low Maintenance
- Native to
- Mexico Gulf, Mexico Southwest
Care notes
Pruning and caring for Dioon spinulosum
- Propagation
- Seed sown at 24 to 32°C in spring in a very sandy potting compost
- Pest resistance
- May be susceptible to scale insects under glass
- Disease resistance
- Generally disease-free
Frequently asked questions
Where is the best place to plant Dioon spinulosum?
Dioon spinulosum prefers full sun. It suits sheltered positions.
What soil does Dioon spinulosum need?
Dioon spinulosum grows best in loam soil. It prefers neutral soil. Aim for soil that stays moist but well-drained.
Is Dioon spinulosum hardy in the UK?
Dioon spinulosum has an RHS hardiness rating of H1b, meaning it needs subtropical warmth of 10–15°C and must be grown under glass in the UK.
How do I propagate Dioon spinulosum?
Seed sown at 24 to 32°C in spring in a very sandy potting compost.