Why a Hedge Is a Calendar You Can Walk Through

A hedgerow is the most underrated thing in the British countryside. We walk past hundreds of metres of it without a glance, yet a good hedge is a strip of woodland squeezed into a line: a bank of soil, a base of nettles and grasses, a woody middle and a flowering top. Read it properly and it will tell you the month, the soil, the weather of the past few weeks and something of the history of the field behind it.

The trick is to learn a dozen common species well, then watch them run through the year. You do not need a botanist's eye. You need a slow walk, a willingness to stop, and the habit of returning to the same stretch every few weeks so you notice what has changed.

Late Winter: Catkins, Blossom and Bare Bones

From January, hazel hangs out yellow-green catkins — the lambs' tails — before a single leaf appears. Look low down on the hedge, in the damper shade, and you will often find them first. Blackthorn follows in March, and this is the loveliest surprise of the whole year: a hedge of frosty white blossom sitting on completely bare black twigs. Blackthorn flowers before hawthorn and carries long, vicious thorns, so handle it with respect. Country people call the cold snap that often arrives with it a blackthorn winter.

With the leaves off, this is also the best time to read the bones of a hedge. Look at the bank and the ditch alongside it, the thickness of the woody stems and whether any of them have been cut and laid at an angle. That tells you whether you are looking at an old, layered boundary or a younger planted one.

Spring: Blossom, Birdsong and the Hedge Bank

Hawthorn — may, or quickthorn — takes over in May with creamy white flowers and a scent that is sweet and faintly strange. Once it is in leaf, the hedge closes up and the birds move in. Listen for the scratchy song of a whitethroat, the rich fluting of a blackcap, and the quiet, steady din of a dunnock singing from deep inside the thorns.

Meanwhile, the hedge bank beneath is doing its own work. Cow parsley rises in frothy white umbels, bluebells and dog's mercury appear in the shadier stretches, and lesser celandine glows in the sun. A hedge bank is often a relic of older woodland, which is why the ground flora can be richer than anything in the field either side.

High Summer: Scent, Flowers and the Growth Spurt

In June the elderflowers open in flat, creamy plates that smell of warm citrus and something slightly musky. Dog roses show single pink-white flowers with a tidy ring of stamens, and honeysuckle threads its way through the whole hedge, releasing scent in the evening. Brambles are flowering too, pale pink and full of bees, and their arching tips will root wherever they touch bare ground.

This is the season for nettles, which is the practical part. Wear long trousers, tuck them into your socks if there is any chance of ticks, and check yourself, your clothes and the dog after every walk. Ticks like warm, tucked-away places — behind the knee, at the waistband, in the hairline — so look properly when you get home.

Autumn: Reading the Berries

Autumn is when the hedge gives you its best clues, if you know what you are looking at:

• Hawthorn haws — deep red, each with a single stone, hanging in small clusters. Usually the last berries left, because they are mealy and not much loved.
• Sloes — the fruit of blackthorn: blue-black, oval, with a dusty bloom on the skin. Bitter enough to make your mouth turn inside out. Traditionally picked after the first frost for sloe gin.
• Rosehips — bright orange-red, often in small groups, with a little tuft at the tip. Picked before the birds strip them.
• Elderberries — small, dark purple, in flat sprays on the same wood that held the flowers. Cook them; raw they do not agree with most people.
• Blackberries — the obvious one, and the best indicator that the season has turned.
• Spindle — four-lobed pink capsules that split open to reveal bright orange seeds. If you find spindle in a hedge, you are looking at ancient wood-pasture ancestry.
• Hazelnuts — green husks in late summer, nuts by September. A neat round hole means a small rodent; a smashed, ragged shell means a squirrel got there first.

Picking leaves, flowers and fruit of common species for your own use is fine, but never uproot wild plants, and always leave plenty for the birds and small mammals that depend on the crop.

Winter: Bare Bones, Tracks and the Hedger's Craft

By December the hedge is stripped back to structure again, and the gaps tell you where wildlife crosses. Look for tracks and droppings in the mud at the base, and note which species has kept its leaves longest — a hedge full of beech or hornbeam in winter is often still holding on to those dead, coppery leaves.

A few practical things worth learning, whatever your interest:

• Hedge laying runs from October to March while the sap is down. Cut most of the way through a stem near the base, bend it over and weave it between stakes. If you see a hedge with diagonal stems and a neat, dense top, it has been laid within the last fifteen to thirty years.
• Coppicing — cutting a stem to the ground to encourage fresh growth — keeps a hedge young and dense. Hazel stools with multiple stems of different ages are the classic sign.
• Walking the same route monthly is the single most useful skill on this list. You will learn more from one hedge over a year than from a dozen hurried walks elsewhere.

None of it requires special equipment: stout boots, a waterproof, a pair of gloves for the thorns and a bit of patience. Keep to the footpath, close gates behind you, and take your litter home. The hedge will do the rest.