What it is
Cut a broadleaf tree to a low stump. It grows back. Cut it again in seven years, or twenty, or fifty. The stump (a stool) keeps living, the shoots keep coming, and the harvest never ends.
Coppice is the oldest sustained-yield system in temperate forestry. Some hazel stools in southern England have been cut on rotation since the Iron Age. The stool is older than the cathedral down the road.
The whole craft turns on one number: the rotation length. Match it to the species and the product, and a single hectare carries a working economy.
The cycles
Each species has its own clock. Cut too early and the poles are weak. Cut too late and the stool may fail to regrow.
- Willow. 3 to 5 years. Basket rods, biomass, living fencing. See willow.
- Hazel. 7 years. Bean poles, hurdles, pea sticks, charcoal. See hazel.
- Ash. 12 to 15 years. Tool handles, firewood, walking sticks.
- Sweet chestnut. 15 to 20 years. Fence stakes, post and rail, vineyard props. See chestnut.
- Oak. 25 to 50 years. Tan bark historically, charcoal, structural timber. See native oaks.
Alder, lime, hornbeam, and sycamore all coppice. Beech coppices badly past pole stage. Conifers (excepting redwood) do not coppice at all.
The compartment system
A coppice woodland is divided into cants. One cant is cut each year on a fixed rotation.
For a hazel coppice on a 7 year cycle, you need seven cants. Cut cant 1 this winter, cant 2 next winter, and so on. By year 8 you are back at cant 1, which now carries 7 year poles ready to harvest.
The maths is honest. Twenty hectares of hazel on a 7 year rotation yields about three hectares of poles every winter, forever. A 30 year oak rotation needs 30 cants and rewards your grandchildren.
Stools are spaced 1.5 to 2 m apart, around 2,500 to 4,000 per hectare. Plant new ones into any gap larger than 3 m. Stools that fail to regrow get replaced from layered shoots or fresh whips.
Cut it
Coppice between November and early March, when sap is down and the stool's reserves are stored in the root.
Cut low. The stump should sit 5 to 15 cm above the soil. Higher stumps rot in the centre and the stool hollows. Use a billhook, a sharp bow saw, or a chainsaw for larger stems.
The cut face slopes outward so water runs off. A flat or inward-sloping cut puddles and invites decay. On hazel and sweet chestnut, take every stem off the stool. Half measures produce weak regrowth.
Stack the brash in windrows along the cant edge. Sort poles by diameter at the felling site. Faggots (the small stuff bound in bundles) were historically the bakery fuel. They still light a wood stove faster than anything else.
Tend it
Year 1 is when the cant lives or dies. The fresh shoots are 30 cm of pure sugar, and every deer, rabbit, hare, and vole within a kilometre knows it.
Protect every cant. A dead hedge built from the brash works in low-pressure sites. Anywhere deer numbers run above 5 per square kilometre, you need a 1.8 m fence around the cant for the first three years. No protection, no coppice. This is the single most common failure mode in modern restoration.
Year 2: thin each stool to 4 or 5 strong shoots. The weak ones get cut at the base. The remaining shoots straighten and thicken with the extra light.
Year 3 onward, leave it alone. Walk through once a year. Note any stool that died and flag it for replanting. By the halfway point of the rotation the canopy closes and the ground darkens.
The light pulse
A freshly cut cant floods the ground with light for two or three years. That pulse drives the wildlife economy of a coppice wood.
In year 1, bare ground and warmth bring solitary bees, ground beetles, and basking reptiles. By year 2, bluebell, wood anemone, primrose, and violet flower at densities you will not see in closed canopy. Year 3 and 4 the shrub layer thickens and warblers, nightingales, and dormice move in. By year 6 the canopy closes and the cant returns to shaded woodland.
The whole rotation rolls this pulse through the wood. Each year a new cant restarts the clock. A working coppice carries more species per hectare than the high forest next door because every successional stage is present at once. See woodland management and edge effects.
The ride butterflies (pearl-bordered fritillary, silver-washed fritillary, white admiral) depend on this pattern. When British coppice collapsed after 1850, they collapsed with it.
The British abandonment
By 1850 the railways carried coal everywhere, cheap fence wire replaced hurdles, and tan bark gave way to chemical tanning. Charcoal demand vanished. Within fifty years, three quarters of British coppice was either felled to high forest or left to stand.
The stools did not die. They just kept growing. A 170 year unmanaged hazel coppice is a tangle of 15 cm trunks splayed from a single root mass, shading out the ground flora, hosting fewer birds than the working wood it replaced.
Restoring lapsed coppice is slow work. The first cut after a long lapse may kill 20 to 40 percent of stools outright. Spread the restoration across years, cut small cants first, fence everything. The wood you bring back is the same wood your great-great-grandfather worked.