Trees and management
Prescriptions for tree surgery work are listed in a Schedule of Works. An example is given below. This document is used to solicit quotations from tree surgeons, or first for getting permission for the work from the local planning authority (if trees are in a Conservation Area or subject to a Tree Preservation Order).
When advice gives rise to a Schedule of Works the client sometimes prefers PWArb to manage the tree work contract, which ends when the work is completed.
A landscape plan frequently involves planting trees. Care is required at all stages: In the supply and quality of planting stock, the specifications appropriate for a particular context, the preparation of the planting site, the planting operation itself, protective measures including staking and guards, aftercare and maintenance.
Scheme of Work - Example
Cut shoots arising from the main stem flush to height 3m. Raise crowns to height 4m all round. Remove dead wood, including ‘hangers’ and suppressed branches (to extend the interval until this operation is required again). Cut main stems of ivy close to ground level.
Tree 3: Sycamore
Conduct aerial inspection of branch union at height 3m. Assuming that the observations from this inspection are compatible with those from the ground-level inspection, sympathetically reduce crown by 30%.
Tree 5: Horse chestnut
Reduce crown by 30%, removing that portion of the crown over-topping Tree 6 and concentrating on defective branches or those with weak origins.
Tree 6: Horse chestnut
Include rotten stubs in the dead-wooding operation.
Tree 7: Horse chestnut
Thin crown by 20%, removing much of the old re-growth consisting of vertical branches to diameter 15cm. The objective is to reassert the pre-existing crown architecture and to avoid a great deal of branch suppression and dead wood development in the short- to medium-term. Remove crossing branch on N side.
Tree 13: Sycamore
Reduce W part of crown so that the Manor is no longer over-topped. Remove one major branch at its origin at height 7m on the W scaffold. Sympathetically reduce two further laterals at their extremities. A great deal of dead-wooding.
Tree 14: Horse chestnut
Tree Group 15: Sycamore and Cherry
Sycamore coppice on S side of avenue, near manor and within 10m of driveway: Remove half of coppice stems, freeing the remainder of competition and avoiding the development of compression joints at base.
Clear fence on the N side of intergrown saplings and climbers. Cut saplings within 0.2m of the fence.