Posted: 04/08/2013 at 15:54
How big is your garden? Are you being too ambitious in a small plot? Many of the problems I find are simply caused by people planting things without looking 20 or 30 years ahead. Forest trees in a small garden are simply not appropriate. The rowan and wayfaring tree can be selectively thinned and the leading shoot shortened any time now; the hazels, as has been said, can be cut to 6 inches; the field maple could make 60 feet high and 40 feet wide, so think on; and unless the crab is on a dwarfing rootstock it will also turn into a big untidy tree, as will the hollies.
So look around for wildlife friendly trees, shrubs and perennials of a suitable size, and if you want to look after woodland edge habitats perhaps you could go and help with National Trust, Woodland Trust or local Wildlife Trust schemes - they'll be glad to have you.