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Ask Gerry

  1 - 6 of 9 answer(s)
 

Alder tree spacing

We're planting an alder boundary behind a new beech & hornbeam hedge. The area is coastal & very windy & wet. How far apart do we space the bare root alder trees? 160320161, , Posted: 16/03/2016

Alder does well in wet ground, beech not so well, and often dies. Hornbeam copes with heavy soil and some amount of wet.

If the alder is to be a shelter belt, work out the number of plants at a spacing of 1.5 metres each way, dividing the spacing into the whole area. But plant at more random spacing, more or less, to give a more natural look.

Keep the trees back 3 metres or more from the hedge or they will over-shadow it. 

 

 

mini native wood

I am creating a native wood in my back garden. I have 4 x 4 m to play with I am wondering what density of trees and shrubs I can use for canopy and shrub layers. eg. Canopy trees 2m apart and shrubs in between at say 1m apart? issy, , Co Wicklow Posted: 30/03/2015

Yes, those spacings are about right. Everything randomized and assymetrical.

  Sad sambucus
 

Sad sambucus

The sambucus nigra in the garden hasn't been happy these past few years; we've tried pruning, then not pruning but nothing has helped. The leaves have some brown marks on, probably not distinguishable in the photo. jacb, Gorey, Co Wexford Posted: 25/08/2011

 

Hard to say from the photo but it looks dark and elder tends to die back if dark and damp.

Give more light, control grass or weeds and feed with compost or shrub fertiliser or general fertliser.

 

Skimmia distance

How far apart (maximum distance) can I put male and female skimmias to ensure the production of berries? I'm planning to put them at opposite ends of the garden (~7m). Is this ok? shazzsamsudin, Wilton, Cork, Co Cork Posted: 15/05/2010

 

Seven metres is fine because bees will carry pollen over quite long distances.

 

shrubs to cover oil burner

I have an oil burner in the middle of my lawn and it can be seen from my kitchen window. I want to put in a small bed of shrubs or plants that will cover or hide the burner. Can you suggest some evergreen shrubs or give me some suggestions to disguise this burner. It is about 3 feet wide and the same in height. GHOC, Fethard, Co Tipperary Posted: 29/04/2010

 

Almost any shrubs could be used for this purpose, such as broadleaved evergreens: laurustinus, aucuba, elaeagnus and hebe. And use some deciduous kinds too.

Lots of information at: http://www.garden.ie/plantdirectory.aspx

 

 

 

eucalyptus tree

When this tree was 24 ins in circumference(trunk) I cut it down c.5 years ago. 7 smaller branches have grown back and are c.30 ft. high. The tree is 12 feet from front wall of the house.. 1)..do you think the tree could pose a problem to house foundations? 2) Is it possible to take a cutting of the tree and keep it in a pot?.....I ask you this assuming that I will have to fell the tree. DOCC, RATHFARNHAM, Co Dublin Posted: 03/11/2009

 

Eucalyptus grows fast in our wet climate and it is not a stable tree, as it has soft wood.

It is too close to the house for safety and will lose stems at some stage. It should not be planted within about 15 metres or more.

You should take it down and paint the cut stump with undiluted Roundup to prevent re-growth, or you can allow a mass of re-growth, and treat it as a bush cust back to base every two years.

It does not grow from cuttings.

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