Container Corner

How to Prune Container Plants

By Sarah Marcheschi

Congratulations, you’ve made a commitment to adding container plants and shrubs to your deck or patio. If the pots are planted with perennials, they’ll need to be pruned from time to time in order keep them healthy and sized appropriately. In this article Sarah Marcheschi, staff gardener and feature writer, explains how to prune container plants.

Why growing container plants is a good idea

Whether looking to dress up the deck in your backyard, or to decorate a terrace, containers provide an opportunity to grow varieties of plants that may seem out of reach due to the constraints of light, soil, and space, or even weather. For the most part, growing shrubs in containers is not much different from growing them in the ground, though they must be watered more frequently, and pruning involves a few extra steps (root pruning, anyone?).

Photo by Sarah Marcheschi

Why container plants need to be pruned

Though shrubs grown in containers sometimes require little in the way of pruning, it is a useful practice as a form of preventive maintenance, to encourage fruit or flower development, and to address damage from insects or disease. Pruning is also frequently used to change the size and shape of the plant for aesthetic purposes, whether by fashioning branches into a charming topiary, or simply preserving a desirable form. And, the health of your plants can be promoted by removing dead or dying branches, as well as branches that have sustained wind or storm damage.

When to prune container plants

Pruning is best undertaken in the late winter to very early spring, before new growth begins. That way, wounds on the plant are only exposed, (i.e. susceptible to diseases), for a very short time before new growth starts and wounds heal. It is also easier to see the overall shape of the plant before leaves emerge and obscure the structure of the branches. The exceptions to this rule are plants that bloom early in the growing season on growth from the previous year. In this case, you may prefer to hold off on pruning until after they’ve finished blooming. Some notable examples include azaleas, rhododendrons, forsythia,lilacs,magnolias, and bigleaf hydrangeas (Hydrangea macrophylla).

Make sure pruning tools are in good condition

Before getting started, make sure you have the proper tools for the job, and that they are in good condition. Maintain hand saws and pruning / lopping shears by keeping them clean and sharp. This makes your job easier because it improves their performance and allows you to make clean cuts to branches, which not only look better, but heal better and are far less likely to invite disease. A pair of pruning shears is ideal for making cuts up ¾ inches in diameter, but the long handles on a set of lopping shears makes it easier to wield when cutting thicker branches.

Related Featured Articles

It’s Time to Prune Trees and Shrubs
By Jean Starr
Read article

Related Videos

Prune After Bloom: Do's And Don'ts Of Spring Pruning
Prune After Bloom: Do’s And Don’ts Of Spring Pruning
Runtime: 2:25
Watch Video
Pruning Trees and Shrubs: The Basics
Pruning Trees and Shrubs: The Basics
Runtime: 3:13
Watch Video

Related Blogs

Pruning Hard, or Hardly Pruning?
By Marci Martin
Read this post

Here’s more information about gardening that you’re going to want

Membership has its perks!

Become a PlantersPlace member! Registered users can ask Marianne Binetti questions, create personal photo gallery and post product reviews.

Create Your Account