This severe pruning will induce a large number of shoots to develop during the growing season. ... Deciduous, formal hedges (those pruned to a definite size and shape), such as privets, that become open and leggy also can be rejuvenated by pruning them back to within 4 to 6 inches of the ground in late winter/early spring.

How long does it take for a hedge to grow back?

Hedges might take three to seven years to attain their desired size. You can buy semi-mature hedges which, although costly, will give an instant hedge. Semi-mature plants require extra care in planting and watering. Hedges might need shelter in their initial years on exposed sites.

How do you bring a hedge back to life?

By pruning out dead or diseased growth, regular watering and feeding and with a thick layer of mulch and compost, it is possible to nurture your hedge plants back to good health.