Italian Alder Hedging Plants - Alnus cordata

Italian Alder Hedge Plants - Delivered by Mail Order from the Nursery with a 1 Year Guarantee

Italian Alder, Alnus cordata, is a vigorous, deciduous tree that grows well on poor or waterlogged soils. It isn't ideal for a neatly clipped, formal garden hedge but it makes rough and ready country hedging.
Italian Alder can reach 30 metres if it grows freely as a tree; 20 metres is more typical.
The plants on this page are young saplings, ideal for planting as hedging or in woodland projects. You can also buy larger Italian Alder trees here.
Browse all of our other Alder varieties here.

Italian Alder plants are only delivered bareroot, during winter (Nov-March).

Choosing a size:
When you are ordering Italian Alder plants for a hedge, we generally recommend that you use plants that are graded at 40/60cms or 60/80cms. They are cheaper than large plants, easier to handle and they will establish well in poor conditions. Use larger plants when you need a tall hedge quickly, or if you are going to let them grow into trees. All our hedge plants are measured by their height in centimetres above the ground (the roots aren't measured).

Spacing an Italian Alder hedge:
Plant Italian Alder hedging at 3 plants per metre, 33cms apart.
You can also plant Italian Alder at 5 plants per metre in a staggered double row, with 33 cms between each plant along the row and 40cms between the rows.

General description of Italian Alder plants:
Alnus cordata is a large, fast growing tree with glistening green leaves and a neat, tear-drop shaped canopy. It grows on wet sites and poor soils, including chalky ones, and it is the best alder for growing on drier sites. All alder trees enrich the soil with nitrogen, released from the colonies of nitrogen fixing bacteria living on their roots. This makes them perfect companion plants for reclaiming sites with degraded soil. Alder roots are strong and fibrous, which makes them very good at holding together loose soil.
Alders aren't generally planted as clipped hedges; Italian Alder is the one that we would really recommend for hedging. It looks good as a low-maintenance hedge that is clipped hard every other year.
Italian Alder is an excellent screening and windbreak tree. It is quick to put on height and it doesn't get bent out of shape by the wind.
Yellow-brown catkins are produced in the spring along with the bright, edible foliage.
Note on Alder roots: Alder has invasive roots that can break old water pipes and damage the foundations of old buildings or walls. 30 metres away from vulnerable structures is a safe distance to plant Alder. New build, concrete foundations are not at risk.

History & uses of Alnus cordata
This tree is native to Corsica, Italy and the West coast of Greece and Albania. It was introduced to Britain in 1820.
Today, timber from this tree is mainly used for paper pulp, charcoal and some furniture. In the past, its rot-resistant qualities made it much more widely used. The so-called floating city of Venice is built on stone foundations that rest on closely packed, vertical tree trunks that reach down to the firm clay far below the famous canals. Most of these support trunks are Italian Alder; a lot of larch was used too. The fact that these wooden foundations are still intact today is not really due to the wood's rot-resistance, however: the wood was first preserved by the oxygen-free environment under the city, then petrified by the flow of mineral rich water around the trunks.

Growing Italian Alder plants:
Italian Alder will grow well in pretty much any soil. It tolerates chalk, sea winds, urban pollution, poor soil and waterlogging. It prefers full sun. It prefers a moist or wet soil, but out of all the Alders, it is still the best choice for dry soils.
It will not grow well in the shade.
Even though it is very hardy, Italian Alder is still a Mediterranean tree. We suggest planting native Common Alder in exposed North-Eastern and Scottish regions, just to be on the safe side.

Prepare your site before planting:
It is good to dig over the area where you plant a hedge several months in advance, especially if the soil is poor. Destroy the weeds first: nettles, brambles and ground elder are tough and a glyphosate based weed-killer is the best way to remove them. Then dig the soil over; remove rocks, roots and other rubbish. Mix in well rotted compost or manure down to the depth of about 2 spades. If your soil is rich, you don't have to dig it over, but killing all the weeds is still necessary.

Watch our video on how to plant a country hedge for full details. The instruction to cut the plants in half after planting only applies to thorny native hedging and plants in the conservation hedge mix: this isn't necessary for Italian Alder.
Remember to water establishing plants during dry weather for at least a year after planting.

Hedge Planting Accessories:
Prepare your site for planting by killing the weeds and grass with Roundup weed killer.
You can buy a hedge planting pack with sheets of mulch fabric and pegs to hold it down.
If you are planting in an area with rabbit and/or deer, you will need to use a plastic spiral guard for each plant, supported by a bamboo cane.
If your soil quality is poor, we recommend using mycorrhizal "friendly fungi" on the roots of new trees and shrubs.
You can also improve your soil with bonemeal organic fertiliser and Growmore.

After you plant a hedge, the most important thing to do is water it in dry weather. If you didn't use mulch of some kind, you will also need to weed around the hedge. Both of these will be necessary for at least a year after planting.

Trimming Country hedge plants: From the winter after planting onwards, your young hedge should be trimmed lightly once every winter, until it is mature. When it is fully grown, you can clip it at anytime.

Special notes on caring for Italian Alder hedges:
Italian Alder is a very tough hedge plant that shouldn't need special attention once it has established. If you didn't use a mulch fabric, it is beneficial to mulch around the base of the hedge each year with well rotted manure or compost.

Hygiene & Diseases:
Dead, damaged or diseased wood can be pruned off as soon as it appears.
Disinfect your pruning tools between every cut if there is any sign of disease.
Burn or dispose of any diseased material, do not compost it.

Read our full terms and conditions here.

Delivery: The basic delivery charge for orders of bareroot plants is £9.49 + vat, which increases to £12.55 + vat if you add any pot-grown plants, standard trees or fruit trees to the order.
Because couriers sometimes experience delays, we schedule delivery by week, not by day. Therefore, please plan your planting day for the weekend at the end of the delivery week or for the week following delivery, at the earliest.
You can choose the delivery week that suits you during checkout and we will email you the day before your plants are due to arrive.

Payment: We do not charge your card until we begin to prepare your order for packing.

Guarantee: If any plants die within a year, we will replace them. We only ask that you follow our planting & growing instructions and sent us clear photographs of the dead plants in situ, so we can help to make sure that the replacement plants succeed. You only pay for the delivery of the replacements.

Please note that our guarantee is void if there is a hosepipe ban in your area: your newly planted hedging must be watered in dry weather while it is establishing. The best way to water is very thoroughly every few days: at least once a week if there is no heavy rain.

Our nursery has been supplying container grown and bareroot hedging plants to gardeners, farmers and town planners since 1949. Our website started in 2003, so we do understand the concerns that you may have about buying hedging plants online. If any of your plants are damaged when they arrive or if you are otherwise not satisfied with your order after you inspect it, please repackage it and contact us. We will give you a refund or send replacements and send a courier to come and collect the unwanted plants.