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ALNUS
Commonly known as Alder
Trees found on poor or wet soils throughout the northern hemisphere. Produces conspicuous male catkins and smaller female ones which develop into cone-like fruits. Some make excellent windbreaks.
Genus of about 35 species of deciduous trees and shrubs found throughout the northern hemisphere usually on poor or wet soils.
Alders are pioneer tree species and used for land reclamation. Their ability to fix nitrogen in the soil improves fertility for species following them.
Other uses include firebreaks and for the bodies of Fender electric guitars.
The majority of pilings on which Venice was built was alder wood.
The UK alder, glutinosa, is a useful wildlife plant. Caterpillars feed on the leaves, the flowers provide nectar and pollen for insects, the seeds are eaten by birds, especially redpolls and siskins, and the roots provide holts for otters.
Further Reading....
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Deciduous - alternate, simple, toothed leaves. Male (longer) and female catkins form on the same tree. Females form cone-like fruit after pollination.
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Tree
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Full sun -
Additional Features - Pests & Diseases - - Phytophthora root rot. -
Place of origin - northern hemisphere. -
Resistant to honey fungus - These plants have little or few problems with honey fungus.
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Soil Conditions - Fertile well drained soil -
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Wildlife - Rabbit Resistant -
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Alnus - Growing Guide
Trees - Care Guide
- How to plant a tree - Video Tip ondemand_video
- How to plant a tree
- Checking 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
Buy Varieties of ALNUS
ALNUS cordata >
Commonly known as: Italian alder.
conical-shaped tree with bright green glossy leaves
ALNUS glutinosa >
Commonly known as: Black alder, Common alder.
yellow catkins in March, suitable as a windbreak especially in waterlogged areas
ALNUS incana >
Commonly known as: European alder, Grey alder.
a very hardy plant which will prosper in the coldest, wettest position
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
Vermin & Pest Control
Tree Guards
Essential small tree protection from vermin and strimming. This pack includes 5 x 90cm canes and 5 x 90cm spiral guards. Includes instructions.
Only £5.00
