How to Propagate Lilac Trees

Overview

Blooming lilac trees, with their long panicles of fragrant purple flowers, are for many people true testimony that spring has finally arrived. Thriving in all but the warmest and most humid areas of North America, they are often planted near back entries or kitchen windows where their fragrance can be easily enjoyed. Often full and bushy, many lilacs grow into small trees with tall and leggy trunks. If you own a lilac of any size or shape, or if you have access to a neighbor's, they are among the easiest landscape plants to propagate by layering.

Step 1

Choose a flexible shoot from the base of the trunk which is about 24 inches long and 1/4 inch thick.

Step 2

Strip about 6 inches of leaves from the stem about 10 inches from the top.

Step 3

Cut a 1/2-inch diagonal slit with a sharp clean knife about midway on the stripped-out area. The cut should go no deeper than 1/4 the diameter of the branch.

Step 4

Dig a hole about 3 inches deep and wide about 12 inches from the base of the shoot. Improve the soil with about 1/3 compost. Replace the bottom 2 inches of soil.

Step 5

Bend an 8- to10-inch length of stiff wire, such as clothes hanger wire, into a tight U.

Step 6

Sprinkle rooting hormone over the cut then gently lower the stem to the hole, using the wire to hold the cut section firmly in place.

Step 7

Cover the hole with the remaining soil and place a rock about the size of a large baked potato over it to keep it in place.

Step 8

Place a 12-inch garden stake 6 inches into the ground next to the shoot, gently bend the stem so that it is upright, and tie it to the stake in two places.

Step 9

Cut the top of the stem so that it is 6 to 8 inches tall.

Step 10

Give the new plant the same care you would give the whole tree. If there is drought, make sure they get enough water so they don't dry out.

Step 11

Continue this care for one year then remove the rock and scratch around the base to make sure there are roots.

Step 12

Free the new plant from the ground by digging gently. Sever the lilac from the mother plant with sharp pruning shears and plant it in its new location.

Things You'll Need

  • Sharp knife
  • Pruning shears
  • Garden stake
  • Garden twine
  • Stiff wire
  • Rooting hormone
  • Compost

References

  • "The All-New Illustrated Guide to Gardening: Planning, Selection, Propogation, Organic Solutions"; Fern Marshall Bradley; 2009, p. 262.
Keywords: lilac, lilac propagation, layering lilac

About this Author

Robert Lewis has been writing do-it-yourself and garden-related articles since 2000. He holds a B.A. in history from the University of Maryland and has training experience in finance, garden center retailing and teaching English as a second language. Lewis is an antiques dealer specializing in Chinese and Japanese export porcelain.