Branchage, which literally means branches, is required by an 111-year-old law that asks land owners or renters in Jersey to cut back any trees, shrubs or grass overhanging roads near their property.
There must be a 12ft (3.6m) clearance over main roads and by-roads, and a clearance of 8ft (2.4m) over footpaths.
The JHPG said: “Hedgehog mothers are nursing their hoglets and if she is killed or injured, or the nest is disturbed, the babies are unlikely to survive.
“This adds to the drastically declining population of our hedgehogs.”
The group advised leaving vegetation uncut on the top of a banque, as long as it does not overhang the road and is still in compliance with the law.
It also suggested leaving tussocks of vegetation for wildlife where possible and removing all cuttings when finished.
Members recommended leaving some vegetation around the base of trees and hedgerows and checking carefully for hedgehog nests on the ground and birds nests in trees and hedgerows before starting any work.
They also suggested using a boot, a gloved hand, a rake or a stick to gently move any creatures out of harm’s way.