Winter Pruning of Limes, Hazels & Dogwoods

Posted on January 14, 2023 by johnshortlandwriter

Hard pruning takes courage and gardeners are often reluctant to carry it out for fear of harming or, even worse, killing the plant. Once it is understood that more trees and shrubs are lost through neglect than by pruning the task becomes somewhat easier. In far too many gardens woody plants are grubbed out because they have outgrown their allotted space when judicious pruning at an earlier stage of their life would have allowed them to thrive and give pleasure for many more years.

*Outgrown its space? Don’t remove it, prune it!*

January and February are the perfect months for carrying out coppicing and pollarding and some shrubs like willow and dogwoods, grown for the winter colour of their bark, are actually improved by the process. Coppicing and pollarding are traditional techniques that have been carried out for centuries in woods and forests to provide a plentiful supply of fuel and fencing materials. As with all procedures, jargon evolves and coppicing and pollarding are just words that describe the removal of branches back to the tree trunk (coppicing) or, in the case of pollarding, the removal of stems to ground level. Somehow, if you just say to yourself, “cut off every branch” the mystery of the process disappears and becomes less intimidating.

*Willows – some newly pollarded line a riverbank*

Limes (Tilia) are very beautiful when grown as full-sized trees but become far too large for most gardens. They are better planted as parkland trees in a field, if you are lucky enough to own one, where there stature and grace can be appreciated from a distance. Too often they are grown where their branches overhang driveways where they drop their sticky honeydew over vehicles and become a nuisance. Most limes are host to tens of thousands of aphids (greenfly) which feed on its sap and then secrete the unwanted waste. Somehow, the gardener’s jargon word ‘honeydew’ sounds so much nicer than ‘greenfly crap!’ If you are determined to plant a lime tree in a confined space the Caucasian Lime, Tilia x euchlora which doesn’t have this problem is the one to go for. Remember that any tree in a confined space will need its size controlled so read on to find out how to pollard it.

*Limes, when mature, are beautiful but very large trees*

The time to pollard a tree is winter and January, when there isn’t too much to do gardening-wise, is the perfect month. I always aim to complete by the 31st which allows time to continue into February, if need be. By the middle of that month the sap will be starting to rise within the tree so it is sensible to complete the task by then. It is very straightforward to remove the branches for which you will need secateurs for smaller twigs, loppers for larger ones and a sharp pruning saw for anything bigger still. Which tool to use when? That too is easy to know. Secateurs and loppers should cut through the stems easily – if you need to twist the tool or the stem, you should be using the saw.

*By midsummer there is plenty of new growth on this old willow pollard*

Common sense will tell you that if you remove all branches from a tree there will be nothing left to offer any screening. This isn’t always important and coppiced trees send out new growth very rapidly as the weather warms up. However, for privacy or a different ornamental effect more careful pruning is required. All that needs to be done is to cut back any branch or twig that has grown beyond the space you have allocated for it.

*A pollarded lime allee provides drama and a focal point*

*This lime allee has had its side branches retained to give denser summer screening*

Limes are not often grown for the colour of their winter twigs probably as they are up rather high and so less noticeable. Willows (Salix) (when coppiced, for they can also be pollarded) and dogwoods (Cornus) are very different for their bright yellow, orange or scarlet stems are very visible and a mainstay for any winter garden. They are also quite simple to prune as it is all carried out at ground level. When the plants are mature, I prefer to cut them over a three year period as this retains their overall height. Quite simply, it means that only a third of the stems are removed or, if you have plenty of shrubs, completely prune one in every three to their base. The purpose behind this pruning is not so much to control their size but to maintain the strength of colour which is at its best on younger shoots. If left, they gradually become quite dull.

Hazels are treated very much like willows and dogwoods, although the usual purpose is purely to maintain a convenient size or to provide ‘pea sticks’ to be used for supporting summer plants as well as peas and beans. For guidance take a look at my earlier post from 2021 which can be read by clicking on the link here.

*A hazel tunnel is created by partial coppicing to reduce the number of tall stems*

Coppicing Hazel – the how, the why, the where

Posted on February 18, 2021 by johnshortlandwriter

Lamb’s Tails (as country children call them), the pale-yellow catkins of the hazel, are a familiar sight at this time of year. A traditional component of our hedgerows, they are perhaps seen in more glory when growing unchecked along roadside verges where they can achieve a much greater height. There, up to 15 metres tall in favoured conditions, the soft golden shimmer of hundreds of catkins really is one of the earliest harbingers of spring.

*Lamb’s tails: their pollen is released by the wind*

Catkins begin to form early in the winter, small, stubby and dull in colour where they wait until, quite suddenly, they are as we see them now. The transition always goes unnoticed. Even less noticed are the female flowers – for catkins are male. Whereas the majority of plants are self-fertile, Hazel, Corylus avellana, is one of a number that carry both male and female flowers. Wind-pollinated, the breeze carries the pollen from the male to the female to fertilise. However, the pollen has to reach a different plant for it to be successful. The tiny, female flowers can be discovered by careful searching along the branches a few days after the catkins have fully formed.

*The short, stubby embryo catkins form* in early winter

The minute, female flowers take a bit of finding…

For gardeners, hazel is one of the most traditional and useful of plants and it is worth growing one or two in an odd corner if you have the room. There they will quickly create a multi-stemmed shrub. Visually, as a garden plant, when left to its own devices, it is of limited value (wildlife love it, of course). However, by coppicing the plant there will be a regular supply of poles for runner beans to climb and the twiggy top-growth is the perfect support for garden peas, mange-tout and the headily-scented sweet peas. They are also useful for supporting taller herbaceous plants, saving them from collapse and look so much more attractive than canes and string or wire netting. It’s far quicker to do, too!

So, what is coppicing and how do you do it? Well, for a start, it’s a dead easy and very uncomplicated form of pruning! All that has to be done is to cut with secateurs or garden loppers the stems to a few inches above ground level during the winter. If you do this over three years by removing only a third of the stems each year you will have stems of varying heights and diameters without losing any screening effect. Although coppicing may seem a drastic form of pruning they quickly regrow and it also prolongs the life of the plant considerably.

*Coppiced hazel can make a good summer screen in the garden*

Many years ago, coppicing of hazel (and, sometimes, ash and field maple too) was standard practice in many of our woodlands. These days it is still carried out as a conservation tool to encourage the breeding of our now endangered dormouse and other wildlife. Hazel is the food plant of many moths and the autumn supply of nuts are great favourites with jays, squirrels and wood mice – and, of course, humans. In the photo below of long-neglected woodland, the hazel is naturally regenerating as coppice as the old and heavy branches collapse onto the forest floor.

*Neglected storm-damaged hazel naturally regenerating as coppice*

Hazel can be useful, along with willow, to create living structures such as pergolas, arches, fencing and tunnels. They all involve regular pruning in much the same way as coppicing although in most instances the number of upright growths is reduced to one or two. The prunings make excellent kindling for wood burners and, if you’re feeling really creative, rustic furniture. Why not have a go? From just one native species we can have fun projects that are ideal for people of all ages. It can be used as an educational tool too: nature study and conservation, rural history and artistry make it the perfect resource for lockdown and home learning.

*This living hazel tunnel* *makes a fine garden feature and is also good for wildlife*

*An imaginative and practical way of using* *hazel branche*s

A Tour of the Secret Valley

Posted on October 26, 2016 by johnshortlandwriter

Ask people – both here at home or abroad – how they imagine Great Britain to be, the answer is often the same: an overcrowded island. We do, of course, have our fair share of big cities, motorways and densely populated housing estates but it often comes as a surprise just how much unspoilt, open countryside remains. A few of us are lucky enough to live in it.

The M40 motorway where it enters Oxfordshire

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Less than two hours drive from the centre of London, the secret valley, seems more like a million miles away rather than just the eighty odd miles that, in reality, it is. Tucked down an unclassified side road and not shown on a number of maps, only those ‘in the know’ tend to visit it. Time for a quick tour.

The Secret Valley

The approach to the secret valley gives little hint of what’s to come. Lined with crab apple trees, the lane gently descends between a fold in the hills where, on the steepest banks, wild thyme, orchids and other wild flowers grow.

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A bend in the road conceals the valley’s crowning glory: the most perfect, easily jumpable river (as can be seen in the header image of this blog page). Twisting and turning as it passes through meadows, in its shallows watercress grows where both trout and crayfish hide. By its banks willow pollards, now elderly and bent, wear garlands of wild roses; they grow from the tree crowns courtesy of seed dropped by birds generations ago.

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The lane, crossing the river, passes our tiny stone cottage and climbs towards the village – a cluster of nine houses, a farm and little else. Our home sits alone, down by the river bank, with just one other as companion. Here, the lane – barely wide enough for a combine harvester to pass – once was busy with drovers taking their cattle and sheep to the markets in Oxford.

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These days the drove road enters and leaves the secret valley by a different route, only its mid-section by our house is still in use. The ‘old road’, as it is known, can still be walked – its path clearly defined by the wild flowers and hedgerows that line it.

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The river, too, has chosen a different route according to the earliest maps. Downstream from our house, it flows past wooded banks to widen into a small lake before passing through fields, these days marshy where the watermill’s sluice gates have decayed with age.

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Further downstream still, where the sheep cannot graze, swathes of scented, moisture loving plants such as wild valerian – looking very different from the one grown in our gardens – provide nectar for insets and a hiding place for deer.

a forest of Valerian & Meadowsweet

On the higher ground of the secret valley, the fields are cultivated with wheat, barley and oilseed rape. Even here, in the favoured places, wild flowers and birds of many types can be found: the diminutive hay rattle, a relic from the old farming days to ravens, buzzards and red kites, all now common again after centuries of persecution.

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