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Common Alder - Alnus glutinosa

Common Alder - Alnus glutinosa

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 Acidic, Sandy, Peaty Acidic, Sandy, Peaty
 Alkaline, Chalky, Calcareous Alkaline, Chalky, Calcareous
 Damp and Clays Damp and Clays
 Neutral Neutral
Growth Rate: Quick Growth Rate: Quick
Height: Medium Height: Medium
Native Native
Use: Farm Woodland Use: Farm Woodland
Use: Firewood Use: Firewood
Use: Shelterbelt Use: Shelterbelt
Wind-resistant Wind-resistant

Characteristics
Plant Protection
Planting & Care
Long Description 5
Images (4)
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A fast-growing, medium-sized native tree found all over Britain, especially in wet places. Very hardy and coping with a wide range of soil types, Alder is particularly useful for preventing soil erosion, and for establishing plantings in waterlogged areas. Young plants are seldom attacked by rabbits or stock, so makes a good choice where this could be a problem.

Site and soil

Alder tolerates a wide range of soils and situations, except very dry conditions. It will grow well on damp hillsides and in boggy, waterlogged sites.

Height and spread

Below are the approximate stages of growth, assuming sited in suitable conditions for this species;

After 10 years: 8m x 2.5m
After 20 years: 9m x 3.7m

Leaf and bark

The leaves are ovate, and glossy dark green, and deeply lobed, rather like an oak, and about 5cm long. The bark is a greyish dark brown, cracked into thin rectangular plates.

Flower, seed and fruit

Male catkins of Alder can be seen as a purplish haze among the branches as early as January, opening to a dull yellow in March and April. Female catkins are very short (0.5cm), becoming woody 'cones' over winter which are a useful source of food for native birds.

Uses

Coppicing, hedging, specimen tree. Alder wood has the property of withstanding constant wetting and drying out, and for this reason was much used in the past for lock gates, mill wheels and troughs. It has also been used for clog-making and furniture, as well as for smaller items. Both the leaves and the bark were used in dye-making, and the tree has several medicinal uses too.

Wildlife

Alder fruits (false cones) are a useful source of food for birds in spring. The catkins are an early source of pollen and the trees provide shelter on wetland sites.

The main reasons for buying protection is to protect the plants against:

  • Pests
  • Spraying
  • Strimming

Pests

When it comes to deciding what protection to choose the golen rule of thumb is to choose the product dependent on which pest you are protecting against. The below will help you in deciding what height of protection you will need.

Vole Rabbit Hare Roe Deer/Muntjac Fallow Deer
Vole, Mice
20cm
Rabbit
60cm
Hare
75cm
Roe Deer/Muntjac
1.20m
Fallow Deer
1.50m

 Download our full protection range as a printable PDF document.

Protection Options

Pest & Minimum Protection Height Protection Type
Where more than one size is listed, the wider diameter protection is recommended for taller, bushier plants.
Support Required
Taller support is recommended for use in sandier, lighter soils and wider/stronger support should be used at exposed sites.
Vole
Vole, Mice
20cm
Vole Guard
20cm
None required
Pest & Minimum Protection Height Protection Type
Where more than one size is listed, the wider diameter protection is recommended for taller, bushier plants.
Support Required
Taller support is recommended for use in sandier, lighter soils and wider/stronger support should be used at exposed sites.
Sorted by price; lowest to highest
Rabbit
Rabbit
60cm
Spiral Guard
60cm x 38mm, 60cm x 50mm
Bamboo Cane
90cm x 9-11lbs, 12-14lbs or 14-16lbs
Tubex Easywrap
60cm x 50-65mm
Bamboo Cane
90cm x 9-11lbs, 12-14lbs or 14-16lbs
Mesh Guard with Spray Shield
60cm x 130mm
2 x Bamboo Canes
90cm x 9-11lbs, 12-14lbs or 14-16lbs
Tubex Fruitwrap
60cm x 65-80mm
Bamboo Cane
90cm x 9-11lbs, 12-14lbs or 14-16lbs
Tubex Ecostart
60cm x 57-73cm
Square Sawn Tree Stake
75cm x 25mm, 75cm x 32mm
Tubex Tree Shelter
60cm x 73-105mm
Square Sawn Tree Stake
75cm x 25mm, 75cm x 32mm
Tubex Shelterguard Mesh Tube
60cm x 80-110mm
Square Sawn Tree Stake
75cm x 25mm, 75cm x 32mm
Tubex Treeguard Mesh Tube
60cm x 80-110mm
Square Sawn Tree Stake
75cm x 25mm, 75cm x 32mm
Tubex Shrub Shelter
60cm x 130-160mm, 60cm x 144-200mm
Square Sawn Tree Stake
75cm x 25mm, 75cm x 32mm
Tubex Shrub Shelterguard Mesh Tube
60cm x 130-160mm, 60cm x 170-200mm
Square Sawn Tree Stake
75cm x 25mm, 75cm x 32mm
Tubex Treeguard Mesh Tube for Shrubs
60cm x 130-160mm, 60cm x 170-200mm
Square Sawn Tree Stake
75cm x 25mm, 75cm x 32mm
Pest & Minimum Protection Height Protection Type
Where more than one size is listed, the wider diameter protection is recommended for taller, bushier plants.
Support Required
Taller support is recommended for use in sandier, lighter soils and wider/stronger support should be used at exposed sites.
Sorted by price; lowest to highest
Hare
Hare
75cm
Tubex Easywrap
75cm x 50-65mm
Bamboo Cane
90cm x 9-11lbs, 12-14lbs, 14-16lbs or 1.20m x 20-22lbs
Spiral Guard
75cm x 50mm
Bamboo Cane
90cm x 9-11lbs, 12-14lbs, 14-16lbs or 1.20m x 20-22lbs
Tubex Fruitwrap
75cm x 65-80mm
Bamboo Cane
90cm x 9-11lbs, 12-14lbs, 14-16lbs or 1.20m x 20-22lbs
Tubex Ecostart
75cm x 57-73mm
Square Sawn Tree Stake
90cm x 25mm, 90cm x 32mm
Tubex Tree Shelter
75cm x 73-105mm
Square Sawn Tree Stake
90cm x 25mm, 90cm x 32mm
Tubex Combitube
75cm x 73-105mm
Square Sawn Tree Stake
90cm x 25mm, 90cm x 32mm
Tubex Shelterguard Mesh Tube
90cm x 80-110mm
Square Sawn Tree Stake
90cm x 25mm, 90cm x 32mm
Tubex Treeguard Mesh Tube
75cm x 80-110mm, 90cm x 80-110mm
Square Sawn Tree Stake
90cm x 25mm, 90cm x 32mm
Tubex Shrub Shelter
75cm x 130-160mm, 75cm x 144-200mm
Square Sawn Tree Stake
90cm x 25mm, 90cm x 32mm
Pest & Minimum Protection Height Protection Type
Where more than one size is listed, the wider diameter protection is recommended for taller, bushier plants.
Support Required
Taller support is recommended for use in sandier, lighter soils and wider/stronger support should be used at exposed sites.
Sorted by price; lowest to highest
Roe Deer/Muntjac
Roe Deer/Muntjac
1.20m
Tubex Tree Shelter
1.20m x 73-105mm, 1.20m x 80-120mm
Square Sawn Tree Stake
1.20m x 32mm, 1.35m x 32mm
Tubex Combitube
1.20m x 73-105mm
Square Sawn Tree Stake
1.20m x 32mm, 1.35m x 32mm
Tubex Shelterguard Mesh Tube
1.20m x 80-110mm
Square Sawn Tree Stake
1.20m x 32mm, 1.35m x 32mm
Tubex Treeguard Mesh Tube
1.20m x 80-110mm
Square Sawn Tree Stake
1.20m x 32mm, 1.35m x 32mm
Galvanised Mesh Tree Guard
1.20m x 300mm
Machine Rounded Tree Stake
1.20m x 50mm, 1.50m x 50mm
Pest & Minimum Protection Height Protection Type
Where more than one size is listed, the wider diameter protection is recommended for taller, bushier plants.
Support Required
Taller support is recommended for use in sandier, lighter soils and wider/stronger support should be used at exposed sites.
Sorted by price; lowest to highest
Fallow DeerFallow Deer
1.50m
Tubex Tree Shelter
1.50m x 80-120mm, 1.80m x 80-120mm
Square Sawn Tree Stake
1.50m x 32mm, 1.80m x 32mm
Tubex Combitube
1.50m x 80-120mm, 1.80m x 80-120mm
Square Sawn Tree Stake
1.50m x 32mm, 1.80m x 32mm
Tubex Shelterguard Mesh Tube
1.50m x 80-110mm, 1.80m x 80-110mm
Square Sawn Tree Stake
1.50m x 32mm, 1.80m x 32mm
Tubex Treeguard Mesh Tube
1.50m x 80-110mm, 1.80m x 80-110mm
Square Sawn Tree Stake
1.50m x 32mm, 1.80m x 32mm
Galvanised Mesh Tree Guard
1.80m x 300mm, 1.80m x 600mm
Machine Rounded Tree Stake
1.80m x 60mm

Spraying

Tubex tree shelters offer the benefit of not only protecting against animal damage, they also ensure that herbicides do not come into contact with the plants during spraying.

The main reason for spraying is weed control, however, there are other options available to suppress weeds. Our accessories section includes weed control matting, fertilisers & wildflower seed.

Strimming

Young plants should be protected from damage caused when strimming. To protect plants solely for strimming, our strimmer guards are the ideal product.

Planting

Follow this link to our 'Planting Advice' page for more detailed information on how to plant your plants.

Rootgrow

We would often advise that you consider using 'Rootgrow' for your bare root plants. Rootgrow simply speeds up an existing natural process. The fungi contained in Rootgrow will begin to colonise the plant or tree roots, extending the root system into the surrounding soil via an extensive network of fungal filaments. 

The benefit of Rootgrowis that it enhances a plants root system so a newly planted plant:

  • Finds more food, finds more water.

  • Needs less fertiliser.

  • Establishes quicker and reduces failure rates (which can be improved even further when used in conjunction with Broadleaf P4)

  • Has increased tolerance to drought and difficult soil conditions

We also have a handy Welfare Guide that includes information on how to check your plants on arrival, how to plant them and also how to look after them. This is sent out with each delivery of bare root plants, but it can be downloaded from our advice pages.

Aftercare

Alder hedges should be trimmed in July and August.

Readily available advice

For additional information on planting and maintaining your plants, please see our advice pages.

We provide extensive articles, tips, and even tutorial videos, ideal for beginners and those with previous planting experience.

 

 

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