Transplanting shrubs: Timing and technique for a thriving garden

It's the end of the gardening season, and those of us who've endured a less-than-perfect layout may be itching to move shrubs around. But proper timing is imperative.

It’s the end of the gardening season, and those of us who’ve endured a less-than-perfect layout may be itching to move shrubs around. But proper timing is imperative.

I inadvertently planted a Clethra bush too close to a peach tree, and their intertwining branches have been taunting me all summer. But because the Clethra is a late-season bloomer, I’ll have to wait a bit longer before I can safely move it.

As a general rule, shrubs (and perennials) that bloom in late summer and fall should be transplanted in spring, just after they emerge from dormancy. This timing provides ample time for roots to establish before the plant’s energy is redirected toward blooming.

Spring and early summer bloomers should be relocated in the fall, when their blossoms and, sometimes, foliage, are long gone.

Start with roots

Before attempting to dig up shrubs, research how deep and wide their roots typically grow. Shallow-rooted shrubs, like rhododendron, for instance, are easier to dig up than, say, manzanita, which have very deep root systems. Take the plant’s age into account, too, as mature shrubs will have larger roots than younger ones.

Your findings will guide your digging: New holes should be as close to twice the width of roots as possible — and exactly as deep.

Always dig a hole for the plant’s new home before removing it from the ground to minimize root exposure.