Remove all old vegetation that has died back before it starts to rot, this includes any remaining stems of perennials, piles of leaves, etc. Prune and tidy perennials Cut back all of last years growth on herbaceous perennials this month, before fresh new growth makes this job much harder and more time-consuming. In milder areas such as the West Coast of Canada and the south of England, this can be done immediately. In cooler areas, wait until the end of this month, so that the old growth can provide that last bit of extra protection from the elements. Carefully sprinkle this material around the plants, taking care not to bury the crowns of perennials too deeply, only add a thin layer over the tops.
Several inches spread evenly works best.
4.Wildlife in the Garden Overwintering pests can be removed if you find them now - groups of snails will often hide together in sheltered corners of the garden. Do be careful not to disturb friendly animals hibernating in these quiet corners, such as hedgehogs in Europe, and racoons in North America. Keep the bird feeders clean and well-stocked, and don't forget their water sources. Late winter is an excellent time to rejuvenate deciduous shrubs and hedges with some careful pruning. Remove overly thick branches to let in light and air and encourage fresh, strong growth from the base in spring.