Monica Johnson and Brigid Campbell
look at the ever-changing flora and fauna in our beautiful wildflower
meadow which is named in memory of Reg Smith, founder of the Hawk Conservancy
Trust.
Hedge-Laying – Reg’s Meadow February 2008
There are big new developments afoot in Reg’s Meadow this
winter, changing the whole appearance of the top and left hand
side as seen from the seating area. One of these developments
is the laying of the left hand, southern hedgerow, planted after
the meadow was purchased. This has grown up strongly, with a
good variety of trees and shrubs and has been very productive
in nuts and fruits, as well as providing some outstanding autumn
colour.
Developing Gaps
Over the centuries hedges have come about for a variety of reasons.
Some hedges occurred naturally, when woodland was cleared for
the growing of crops and the edges were left standing as boundaries.
These may have been used to provide wood for fuel or fencing,
to give shelter or to provide fruits and berries in autumn,
for animals, birds or humans. Deliberately planted hedges really
came into their own as a result of the various Acts of Enclosure
(or Inclosure as they were then called) which took place from
the 13th century onwards, reaching a peak between 1750 and 1850,
when it was estimated that over 200,000 miles of hedgerows were
planted in around 100 years, as much as in the previous five
centuries together. Sometimes they simply marked the boundary
between land belonging to different owners. One of the most
important uses of the hedge has always been to provide a stock-proof
barrier, for keeping cattle or sheep in or out and it is for
this purpose that the craft of hedge-laying was developed. As
a hedge grows taller, it becomes more tree-like than shrub-like,
and gaps develop lower down. Animals are gradually able to push
through these gaps and the hedge is no longer stock proof. A
hedge can be successfully managed by trimming for many years
but once it becomes gappy at the base, one of the best way of
restoring it and lengthening its life is to lay it.
Hedge laying is normally carried out during winter, ideally
between November and the end of February, while the trees and
shrubs are bare of leaves. It should not be done during very
frosty weather, as the stems become more brittle in these conditions
and can easily snap. A hedge is ready to be laid when it reaches
between 2.5 and 5 metres in height and when its main stems are
5-10cm in diameter, around the thickness of an average wrist.
Here are some of the tools used in the process – thick,
thorn-proof gauntlet gloves are also required, especially when
laying hedges containing large quantities of hawthorn and blackthorn,
which are very common hedgerow species. The two tools on the
right are billhooks.
There used to be many different designs of billhook, depending
on the area in which they were made and used. Nowadays these
have been standardised down to a few basic shapes and produced
by a small number of manufacturers, but it is still possible
to find older refurbished billhooks in many different styles.
This photograph shows just two of them, one sharp and ready
to be used.....the other very much in need of some attention!
The one on the left is more often found in the south of England
and the right hand one in central and northern areas.
Overgrown Hedge
Preparing the Hedge
Before beginning the actual laying of the hedge you need to
clear away all weeds and rubbish from the base of the stems.
This allows you to see what material you have left to work with
and shows up any significant gaps. Diseased or dead wood should
also be removed at this stage, as well as thick stems unsuitable
for laying, and side growth should be cut back towards the line
of the hedgerow. The hedge in Reg’s Meadow has a lot of
side growth, overhanging the grass for a long way towards the
path. The laid hedge should not be too wide, allowing the light
in to encourage new growth, so this needs cutting back quite
a lot.
Pleaching
Pleaching Cut
The first step in the actual laying of a hedge is called pleaching,
which involves making a cut through about three quarters of
the stem, about 10cm from the ground, cutting down at an angle
of 45 degrees, and leaving just enough of the wood to allow
new growth to spring up from the cut area. (The thicker the
stem being cut, the longer and steeper the cut should be made).
This looks very drastic, but provided the cut does not go too
far through the stem, it does not do the plant any harm.
Tree section
A tree’s bark is only a thin covering layer, with most
of the tree contained inside. The inner layer of the bark is
called the cambium and is the part of the tree
that causes it to grow bigger, producing the annual growth rings
by which you can tell the age of a tree when it is cut. Inside
the cambium is the sapwood layer, the lighter
area around the edge of the section of wood shown here. This
is the part that carries water and sap up through the tree to
the leaves. The darker, inner section is the heartwood.
As the tree grows, a new layer of sapwood is formed, and the
old layer dies and dries out, enlarging the heartwood. When
pleaching a stem it is essential to leave the cambium layer
and a small part of the sapwood layer, otherwise the stem will
die and not produce new growth. Pleaching has traditionally
been done using a sharp billhook, but it can also be carried
out with a hand axe or a bow-saw, which are often used by less
experienced hedgers, as they are sometimes a little easier to
control. It is all too easy to cut right through a stem, which
cannot then be laid into the hedge.
Bending the Pleachers
Preparing the Stakes
Once the pleaching cut is made, the stem is bent gently to one
side, making sure that it does not twist and break, until it
reaches an angle of between 45 and 60 degrees above the horizontal.
The stems must not lie flat or bend downwards, as sap always
rises and cannot flow downhill. The protruding “heel”
or stump left from the cut should be removed to leave a clean
surface that will allow rainwater to run away, so that it will
not collect and rot the wood. The next stem is then pleached
and bent down at the same angle above the previous one and this
continues along the hedge. To give the hedge stability, sharpened
stakes are sometimes driven into the ground at intervals, with
the tips of the pleached stems woven into them. The stakes should
be left protruding above the top of the hedge until it has all
been laid, as they will be used again in the final stage.
Weaving the Binding
The appearance of hedges varies greatly from one part of Britain
to another. Sometimes the brush on the pleached stems is all
angled to one side, while in other hedges it is distributed
evenly on both sides. Some hedges are planted on top of a bank,
the hedge itself being very short. Some are simply left with
the pleachers woven around the posts for stability, but others
have a final stage which entails putting a binding along the
top of the hedge to make an attractive-looking finish and hold
the stems in firmly to the supporting stakes. This is done using
long thin binders, usually of hazel, which is supple and whippy,
woven in pairs or sometimes fours, alternately behind and in
front of the tops of the stakes which were left protruding above
the sloped stems. When the binding is complete it is tamped
down to fit tightly along the top of the hedge, holding everything
in place. The hazel binding will eventually rot, but by this
time new growth will have come up through the hedge to stabilise
it.
Occasional Trees
As the hedge is being laid, large nicely-shaped trees are often
left standing at intervals. This breaks up the hedge line and
looks attractive, as well as providing shelter and nesting sites
for birds. When the hedge is newly laid it is a good idea to
trim off lower tree branches to allow in plenty of light, as
this will help to encourage the new growth. If there are large
gaps where the bent pleachers will not reach, these gaps are
sometimes filled with stakes and brushwood cut out during the
preparatory stages, but this will soon look unsightly as the
dead wood will not regrow with the rest of the hedge. A better
solution is to fill the gaps by planting new young hedgerow
plants, which will grow up and merge into the laid hedge.
The Finished Hedge
The laid hedge will look neat but rather bare at first, but
new shoots will grow up from just below the original cut at
the base or from the roots to the side of the stems. These will
grow up through the layers and on above the top, improving the
stock-proof nature of the hedge and producing flowers and fruit
again. The new growth should be lightly trimmed after two years,
then every three to five years after that. The hedge laying
process turns an untidy, gappy hedge into a neat, stock-proof
barrier with fresh young growth and prolongs its life for many
years to come.
Only a short length of the hedge in Reg’s Meadow has
been laid so far – most of the photographs are from
“one I laid earlier” on a college course, and
one is from the annual Surrey Hedgelaying Competition. Photos
1, 2, & 5, plus the close-up of a pleached stem and the
“occasional trees” were taken in the meadow.
Featured Species – Field Maple (Acer campestre)
Flowers of Both Sex
The “occasional trees” shown
above in the meadow hedgerow are Field Maples. This is a small
native British tree, common across England and Wales, that grows
to around 15 metres tall and reaches maturity at around 50 years.
It prefers alkaline or chalky soil and is typically found on
the edges of deciduous woodland, often growing near oak. It
is often planted in hedgerows, where it is a useful addition,
as it will stand regular trimming.
The bark is deeply fissured and new young twigs
are recognisable by their pale, reddish-brown colour. They grow
in opposite pairs, each pair at right angles to its neighbours.
The palmate leaves have three to five lobes and are four to
seven centimetres long, smooth on the top surface and downy
underneath. The leaves and flowers appear at around the same
time, during April and May. Male and female flowers are often
carried in the same cluster – the male flowers have conspicuous
stamens and the female flowers have winged ovaries. The top
flower in this photo is female and the bottom right hand flowers
are male.
Fruiting Keys
Autumn Gold
The seeds appear in June and July and are known as keys.
They grow in clusters of flat pairs, which ripen in October
and fall in November. Like sycamore keys they are often used
by children as “helicopters”, thrown into the air
to spiral down, demonstrating the way in which they are dispersed
naturally by the wind. The leaves turn a deep yellow in autumn,
the brightest of any native British tree.
Alternative names include Common Maple, Hedge Maple and Masarn
(Wales). The name Acer means “sharp”
or “pungent” and campestre means “of
fields”.
The tree is said to support 51 species of wildlife, including
honey bees and several species of moth.
In folklore Field Maple is associated with the heart and
love and said to bring contentment to those with heavy responsibilities.
Carrying a child around the tree or passing it through the
branches was believed to bring long life to the child. In
Alsatian folklore it was said that bringing branches of field
maple into the house would protect against bats and keep nesting
storks safe from disturbance!
In medicine a decoction has been used to treat sore eyes,
and the astringent bark used to treat gallstones and high
cholesterol. The sap contains sugar, which has been concentrated
into a syrup or used as a sweetener for food.
The wood is fine-grained but the trees are too small to supply
large pieces of timber. It takes a high polish, so is valued
by cabinet makers and wood turners. It has an attractive curving
pattern of growth rings and has long been used to make musical
instruments, such as violins and cellos. Harps have been made
from it since Saxon times and a harp frame made from field
maple was found in the Sutton Hoo ship burial.
Field maple is efficient as firewood and makes good charcoal.