Bonsai is an art form using horticultural material. Unlike a sculptor who can put his tools down when the piece is finished, bonsai is an ongoing art form which needs regular attention. The miniature trees are grown to look like full grown trees as Reg Bolton from the Federation of British Bonsai Societies explained to Ken Crowther.

For thousands of years trees have been coppiced or pollarded for timber and charcoal. Today, gardeners use these techniques to promote young stems, restrict size and rejuvenate plants that respond to hard pruning, as Yvette Faris has been finding out.