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KALOPANAX septemlobus
Commonly known as Castor aralia, Prickly castor oil tree
(Pictus) - an architechural tree with broad sycamore-like leaves but with stout prickles all over the stem. Clusters of white flowers in autumn
Further Reading....
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Deciduous - dark-green leaves to 35cm (14in) across from swollen, late-winter buds.
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White -
Height - 10m (33ft) -
Spread - 10m (33ft)
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Tree - spreading tree. Produces 4- or 5-petalled very small flowers followed by spherical, blue-black fruits.
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Hardy - very cold winter - Hardy in all of UK and northern Europe. Plant can possibly withstand temperatures down to -20°C (-4°F) -
Full sun - likes to be sheltered by other trees and shrubs -
Additional Features - Architectural interest -
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Good to know - syn. K. pictus. A fine, unusual specimen tree. Flowers attract insects. -
Pests & Diseases - none -
Place of origin - China, Korea, Russia(S. Kurile Islands, Sakhalin), Japan(Ryukyu Islands) -
Flower Shape - Panicles - - large panicles 20-30cm (8-12in) long
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Hardiness - Fully hardy -
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Pruning group - Pruning group 1
Suitable for: Deciduous and evergreen trees, and some deciduous shrubs.
Pruning: Minimal pruning required. Prune wayward or crossing branches to maintain a healthy framework.
When: When dormant in the late winter/early spring. Some in the summer/autumn to prevent bleeding of sap.
RHS group 1 -
Seasonal Interest - Summer -
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Soil Conditions - Fertile moist well-drained soil -
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Tree Shape - Rounded to broadly spreading -
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Kalopanax - Growing Guide
Trees - Care Guide
- How to plant a tree - Video Tip ondemand_video
- How to plant a tree
- Ties - Video Tip ondemand_video
- Restaking fallen young trees - Video Tip ondemand_video
- Fallen old tree - Video Tip ondemand_video
- Clearing up fallen beech tree - Video Tip ondemand_video
- Spring pruning - Video Tip ondemand_video
- Removing side shoots - Video Tip ondemand_video
- Pruning and Shaping Magnolia - Video Tip ondemand_video
- Deer protection - Video Tip ondemand_video
- Weed Spraying - Video Tip ondemand_video
- Removing Ivy - Video Tip ondemand_video
- Removing wire protection - Video Tip ondemand_video
- Tree Survey - Video Tip ondemand_video
- Crown uplift - Video Tip ondemand_video
- Removing shoots below graft - Video Tip ondemand_video
- Removing peeling bark - Video Tip ondemand_video
- Maintaining variegation - Video Tip ondemand_video
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10m (33ft)
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10m (33ft) |
Useful extras...
Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00
Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
2 options from £6.00
Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants.
Perfect used in conjunction with Rootgrow™.
Only £7.50
Garden Goodies
Slate Plant Labels
These wonderfully tactile natural slate plant labels are hand made in Cornwall and come with a chalk pen.
Just stick them in your pot or border. Pack of 6.
Only £10.20
Garden Goodies
Slate Tie-on Plant Labels
Hand made in Cornwall, these delightful natural slate labels are perfect for pots.
Comes with chalk pen. Pack of 5
Only £10.20
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