Training
Beautiful Flowering Shrubs
into Unique Ornamental Trees

© Copyright 2000
by Michael J. McGroarty

Don’t confuse what I am about to explain here with the common technique of grafting flowering shrubs on to the tall stem of some sort of rootstock. Grafting is very effective, but not so easy to do. Not only that, when you train the shrub to grow into a single stem tree, you can end up with some very interesting plants.

Training a flowering shrub to grow into a single stem tree is actually pretty simple. The younger the shrub you start with, the easier it is to train. I have a friend who grows thousands of Tree Hydrangeas a year, and this is how he trains them. The variety that he grows for this purpose is P.G. Hydrangea. (hydrangea paniculata grandiflora) This is the one with the huge snowball blooms.

He starts with rooted cuttings and lines them out in the field about 30" apart. The first year he allows them to grow untouched as multi-stem shrubs. Being a fast growing shrub, they typically produce 3 to 4 branches that grow to a height of about 3 to 4’ that first season. The following spring he goes into the field, examines each plant and selects the one stem that is the straightest, and is likely to grow straight up from the roots if tied to a stake. He then clips all of the other branches as close to the main stem as possible. Then he pounds a stake in the ground as close to the main stem as possible, and clips the tip off the single stem that is left. This forces the plant to set lateral buds at the top, rather than continue growing straight up. These lateral buds will grow into branches that will form the head of the tree. He then ties the stem to the stake. As it begins to grow, any buds that appear below that top group of buds are picked off to keep the single stem tree form.

Some of the shrubs that make beautiful and unique ornamental trees are many varieties of Viburnums, Burning Bush, Winged Burning Bush, Red and Yellow Twig Dogwoods, Weigela, Mockorange, Rose of Sharon, and Flowering Almond. I’m sure there are many more.

My favorite shrub to train into a single stem tree is Harry Lauder’s Walking Stick. In shrub form this plant is extremely interesting with it’s twisted and contorted branches. The new growth is reminiscent of a pig’s tail. Using the same technique as described above I select a single stem, tie it to a stake, and train it to grow as a single stem tree. The effect is totally unique.  See the photos below.  

Call your local garden stores and ask them if they have a Harry Lauder's Walking Stick. 

Give it a try, I’m sure you’ll have fun as well as create some very interesting plants for your landscape.

the end

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