Why rotation length is the heart of the craft

Coppicing is often described as though it were one technique, a single inherited habit of cutting trees to the ground and letting them shoot again. In practice, the interval between cuts is the decision that shapes everything else. The rotation determines the size, straightness and quality of the material you take off, and therefore what you can make from it. A seven-year hazel stool yields rods you can bend into a hurdle. Leave that same stool for fifteen years and you have coarse material fit for spar work or the fire, but useless to a hurdle-maker. Set the rotation too long and the stool becomes overstood, its base shaded and its vigour slipping away. Cut too often and you exhaust the roots, thinning the crop year on year until the stool dies.

Species, site and end product all pull on the same rope. Get them in balance and a coppice stool will outlive the person cutting it, often by several centuries.

Hazel: seven to ten years, and why the product decides

Hazel is the classic coppice of lowland Britain, and the traditional hurdle-maker's cycle is seven to ten years on reasonable ground. On thin chalk or poor acid soils, ten to twelve years is more realistic because growth is slower. On deep, moist loam, seven may be ample. The product narrows it further:

• Pea sticks and small stakes — two to four years, cut when the rods are finger-thick and whippy.
• Bean poles — four to six years, straight, clean and tall.
• Hurdle rods, thatching spars and besom handles — seven to ten years, the classic middle ground.
• Binders, hedge stakes and heavier spar work — twelve to fifteen years, occasionally longer.

Cut low, perhaps 15–30 cm above ground, and cut in winter while the sap is down. Protect the stools from browsing: a hazel coppice grazed hard by deer, rabbits or livestock loses vigour quickly and may never recover its old rhythm.

Willow: the short, sharp rotation

Willow is the sprinter of the coppice world and tolerates the shortest cycles of any common British species. Traditional osier beds were cut annually or every two to three years for basketry rods, and the same interval still suits fine weaving work. Where the crop is destined for biomass or fuel, three to four years is typical. Willow grown for garden structures, wigwams and hedging withies sits comfortably at two to four years.

On wet ground, willow can put on a metre or more of growth in a season, which is why the rotation can be so brief. Its close relative alder, also at home on damp sites, runs slower: fifteen to twenty years for clog soles, charcoal and fuel. Do not confuse short-rotation coppice willow with cricket bat willow, which is grown as a standard tree and left for decades.

Sweet chestnut and the longer cycles

Sweet chestnut coppice is the mainstay of the Weald, parts of Hampshire and the Welsh Marches, and it rewards patience. Fencing stakes and cleft pales come off a twelve- to twenty-year rotation. Hop poles were traditionally cut at about sixteen years, straight and strong. Where larger poles, rails or rustic timber are wanted, twenty-five to thirty-five years is not unreasonable. Chestnut heartwood is durable and splits cleanly, which is why the stools have been cut on these cycles for centuries and why some of them are now enormous, several metres across.

Longer rotations demand more light and more room. Thin the canopy if necessary, but avoid opening the wood so far that wind and frost undo the work.

Other species and their timings

• Oak — twenty to thirty-five years, for charcoal, firewood and historically tanbark.
• Ash — fifteen to twenty-five years for tool handles, hurdles and firewood, though ash dieback means many stands are now cleared rather than rotated.
• Field maple — fifteen to twenty years; superb for turnery and small furniture.
• Hornbeam — fifteen to twenty-five years; dense, hard wood for mallets, tool handles and fuel.
• Lime — ten to fifteen years; soft, carvable wood, and bast fibre in the past.
• Birch — ten to fifteen years, though it coppices less reliably than most.

In a coppice-with-standards wood, the standards — usually oak — are left standing for fifty to a hundred years or more, while the underwood is cut on the shorter cycles above.

Judging your own rotation

No table can tell you precisely what your wood needs. Walk the coupes and read them. If most rods are the size you want, the rotation is about right. Look at the stools: vigorous shoots rising from the base, moss and woodland plants between them, and no sign of dieback all point to health. Then watch for the warning signs — rods that have gone coarse and shaded, stools that are rocking in the ground, or a mat of leaf litter smothering new growth.

Keep simple records: the year each coupe was cut, what was taken, and what sold or worked well. Cut a different coupe each winter so the work and the income are spread evenly. Treat your rotation as a working hypothesis rather than a fixed rule, and be willing to shorten or lengthen it as the wood tells you. A well-judged rotation leaves the woodland always holding some young growth, some middle-aged stems and some older stools — a mosaic that is good for wildlife and good for the craft alike.