Start with What the Woodland Gives You

A rustic bench built from fallen branches is the most forgiving piece of garden furniture you will ever make. It has no joinery to get precisely square, no veneer to spoil, and no need to match a catalogue. What it does need is decent timber and a bit of patience, because green wood will twist, shrink and split as it dries. Choose material that has already done most of its moving.

The best stock comes from storm-fallen limbs, hedgerow thinnings or dead-standing branches that have been off the tree for a year or more. Look for grey, sound wood with tight bark and no spongy patches. Hazel, ash, oak, sweet chestnut and larch all work beautifully; sweet chestnut and oak last longest in damp ground. Avoid elder, which is brittle and hollow-hearted, and avoid anything smothered in ivy — the bark will peel and take the surface with it.

If you are cutting fresh timber, fell it in winter when the sap is down and stack it clear of the ground, under cover, with spacers between the pieces. As a rough rule, allow a year of air-drying for every 25mm of thickness. A branch the width of your forearm wants at least two summers before it becomes a bench.

Tools and Fixings You Actually Need

This is a hand-tool job, and none of it is expensive. You will want:

• A pruning saw or bow saw for cross-cutting, plus a finer saw for notching
• A hatchet or billhook for trimming knots and knocking off side branches
• A cordless drill with an auger bit for deep holes, or a brace and bit if you prefer the quiet approach
• A 20mm chisel and a mallet for cutting shallow notches
• A spokeshave or coarse file for smoothing the seat edges
• Galvanised coach screws (roughly 10mm by 150mm) or 20mm oak dowels
• Boiled linseed oil, a brush and some clean rags
• A spirit level, a tape measure and a spade

Use galvanised or stainless fixings throughout. Ordinary steel screws will stain the timber black within a season and rot out fast in wet ground.

Building the Bench

The simplest sturdy design is a pair of log legs carrying a plank or half-log seat, with a low backrest bolted behind. Sit your seat height at 44–46cm from ground level — that suits most adults, and a bench that is too low is miserable to rise from after a long afternoon.

Cut two leg sections about 45cm long and 15–20cm in diameter, and set them roughly 1.2m apart. Cut a shallow cradle across the top of each with your saw and chisel so the seat beds down without rocking. Bore two holes through each leg and up into the seat, counterbore them slightly, then drive your coach screws home. If you prefer pegged construction, drill matching 20mm holes and tap in oak dowels with a mallet, then saw them flush.

For the seat itself, a 1.2m length of 25mm-thick oak or larch plank is quick and comfortable, but a halved log — split with wedges and flattened on the underside — looks far more at home in a wood. Three 7–8cm branches laid side by side also work, provided you screw a cross-brace underneath at each end to stop them rolling.

Add the backrest last. Two uprights of 60–70cm, bolted to the rear of the legs and leaning back about 15 degrees, will carry a top rail and a mid rail. Keep the rails slightly irregular in thickness; a bench that looks too neat loses its charm.

Siting It in a Naturalistic Planting Scheme

Position matters as much as construction. Tuck the bench at the edge of a clearing, where dappled shade falls across it for part of the day, rather than in the middle of an open lawn. A spot facing a mossy log pile, a drift of foxgloves or a small pond will give you something to look at.

Set the feet on a bed of compacted gravel or three paving slabs sunk flush with the soil. Direct contact with wet earth is what kills timber benches, and a dry footing will add years to its life. Clear leaf litter from around the legs, but leave the surrounding ground undisturbed — ferns, wood anemones and bluebells will colonise the bare patch within a season or two. A bench that sits among the planting rather than apart from it always looks as though it grew there.

Finishing and Aftercare

Sand or shave the seat until it is smooth to the back of the hand, and round off the front edge so it does not bite into the legs. Treat the timber with two coats of boiled linseed oil, thinned for the first coat so it soaks in, and leave it to dry for a day between coats. Never varnish it. Varnish traps moisture, flakes in frost and looks thoroughly suburban against bark.

Refresh the oil each spring and check the fixings after winter gales. Tighten anything loose, and if a leg starts to soften at the base, cut 5cm off it, re-drill and set it on a fresh slab. Treated kindly, a bench like this will quietly hold its place in your wood for fifteen years or more.