Beech

Light and exposure

Beech grows equally well in full sun and partial shade, which makes it an unusually easy-going tree among the giants of the forest. When young it even appreciates a little shade, as it would find at a woodland edge or under a thin canopy, a shelter that limits drying out and softens late spring frosts while it gets its roots down properly.

As a clipped hedge, beech tolerates any orientation, including an aspect that never sees direct sun, which is why it is the most reliable boundary hedge in temperate gardens. Once mature and grown as a standalone specimen, it spreads a wide crown and needs room, allow several metres of clearance on each side for it to develop fully.

Watering

Once well established, beech makes do with ordinary temperate rainfall and needs no particular watering after the first two or three years following planting. Young trees, though, need generous watering in dry summers, especially in their first season, while the roots are still reaching down to find moisture below.

In a freshly planted hedge, mulching at the base cuts down evaporation and spaces out watering. The real danger, in fact, is not too little water but too much: soil that stays waterlogged all winter suffocates the roots and can weaken even a mature beech.

Soil and repotting

Beech likes soil that is cool, deep and well drained, ideally slightly acidic to neutral. Deep loamy soils suit it perfectly, they are the ones that carry the great natural beech woods.

What it cannot stand is standing water: heavy, poorly drained soil rots the roots within a few seasons. It also copes badly with pure chalk and soil that is too compacted lower down, which blocks root growth. An ordinary garden soil, neither too dry nor waterlogged, suits it just fine.

Temperature and humidity

Beech is properly hardy and unbothered by cold winters: once well established, it takes frosts well below minus 15 degrees without any damage, and a mature tree goes down to around minus 30 (USDA zones 4 to 7).

Its real weak point lies elsewhere: young trunks, still thin and without thick bark, suffer sunscald when they are suddenly exposed to the full midday sun, for example after a nearby tree is felled or thinned and leaves them exposed overnight. Mulching at the base and, for young standalone specimens, a trunk guard for the first few years prevent this problem.

Pruning and upkeep

For a beech hedge, a single yearly trim is plenty, done at the end of summer once the growth of the season has stopped. That timing is the key: pruning then prompts the beech to put out fresh leaves that stay dry and clinging to the twigs all winter, a phenomenon called marcescence, which is exactly what makes a beech hedge such a good windbreak in the depths of winter.

An earlier trim, in spring or early summer, gives a hedge that drops its leaves normally in autumn, without that effect. For a standalone tree, pruning is limited to removing dead wood or badly placed branches, done outside the sap-rising period, ideally at the end of winter.

Pests and diseases

Beech scale is the most common problem on this tree, recognisable by a white, cottony fuzz that covers the bark of branches and trunk. It weakens the tree and opens the door to secondary problems if it takes hold heavily. Woolly aphid causes similar damage on young shoots.

Mildew mostly affects young plants and freshly planted hedges, showing as a white felting on the leaves in warm, humid weather, with no real harm to an otherwise healthy tree. The real silent enemy remains sunscald on the bark of young trunks, which opens wounds that fungi then settle into for good.

Propagation

Sowing beechnuts is the natural method, but it takes patience: collect the beechnuts in autumn, as soon as they drop, they need a spell of cold, either outdoors or in the fridge, all winter before they will germinate the following spring.

For a hedge, the cheapest and most widely used option remains buying bare-root plants, put in during the dormant season, from leaf fall to the start of growth. It costs noticeably less than container-grown stock, and take-up is excellent as long as planting happens before any hard frost.

Month-by-month care calendar

Green Hub tips

• Always plant bare-root during the dormant season, from leaf fall to the start of growth, it costs far less than container stock and take-up is just as good.
• To keep the dried leaves all winter on a beech hedge, trim it just once, at the end of summer, never in spring.
• Allow roughly 20 centimetres between each plant for a dense hedge, that is 5 to 7 plants per metre of run.
• Shield the bark of young standalone trunks from direct full sun in the first few years, sunscald leaves wounds that last.