Renewing an Overgrown Common Lilac Over Three Late Winters With a 32-Inch Bypass Lopper: One Third of the Thickest Stems at Ground Level Each Year
Disclosure: This post contains affiliate links. If you purchase through these links, we may earn a small commission at no extra cost to you. An old common lilac that has turned into a clump of bare, trunk-thick stems with flowers only at the top can be brought back without losing every bloom. Over three late winters, cut out a third of the thickest stems at ground level each year with a 32-inch bypass lopper and a hand saw. The young shoots that follow fill the base back in. How do you renew an overgrown lilac without losing all the flowers? Use a three-year cycle. In late winter, cut one third of the largest, thickest stems as close to the ground as possible, plus any dead ones, then repeat with another third the next two winters. The untouched stems still bloom each spring while new shoots grow in from the base. Nebraska Extension's Pruning Lilacs lays out that three-year strategy. Common lilacs can reach 15 to 20 feet , the lower stems lose their leaves in the shade of the...