What to do when hydrangeas get too big?

When hydrangeas become too big, it’s important to take action to maintain their size and shape. One approach is to turn larger plants into small trees, which can be a great solution for panicle hydrangeas. I recently encountered a situation with a Pinky Winky Hydrangea that had grown to be about eight feet tall. Instead of allowing it to become unruly and difficult to manage, I decided to prune it from the ground up and transform it into a small tree.

To begin with, it’s crucial to have the right tools for the job. I recommend using sharp pruning shears or loppers to make clean cuts without damaging the plant. Safety goggles and gloves are also necessary to protect yourself during the pruning process.

When pruning a hydrangea to create a small tree, start by removing any lower branches that are growing horizontally or crossing each other. These branches can be pruned close to the trunk, but be cautious not to cut into the main stem. By removing these lower branches, you will expose the main trunks and create a clear trunk formation.

Next, identify the strongest and most upright trunks that you want to keep as the main structure of the tree. Typically, three to five trunks work well for creating a balanced and aesthetically pleasing small tree. Trim away any competing or weaker trunks, cutting them close to the ground.

As you continue to prune, remember to step back and assess the overall shape and balance of the tree. It’s important to maintain a natural and graceful appearance. Remove any dead or damaged branches, as well as any branches that are growing inward or overcrowding the center of the tree. Thinning out the canopy will allow for better airflow and sunlight penetration, promoting overall health and vigor.

Regular maintenance pruning is also necessary to keep the small tree form of the hydrangea. This involves periodically removing any new growth that emerges from the base or lower portion of the trunks. By consistently maintaining this pruning practice, you can prevent the hydrangea from reverting back to its previous bushy form.

In addition to pruning, it’s essential to provide adequate support for the small tree as it continues to grow. You can use stakes or a small trellis to help the trunks remain upright and sturdy. As the hydrangea matures, periodically check the supports and adjust them if necessary.

To ensure the health and vitality of the hydrangea, it’s crucial to provide proper care and maintenance. This includes regular watering, especially during dry periods, and applying a balanced fertilizer in the spring. Mulching around the base of the tree will help retain moisture and suppress weed growth.

When hydrangeas become too large, transforming them into small trees can be a practical and visually appealing solution. By employing proper pruning techniques and ongoing maintenance, you can create a beautiful small tree form for your hydrangea. Remember to have the necessary tools, assess the shape and balance, remove unwanted growth, and provide support as needed. With these steps, you can enjoy a well-maintained and manageable hydrangea tree in your garden.

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Caroline Bates

Caroline is a Miami-based landscaper who specializes in drought-tolerant landscapes. She is the mother of two young children and also enjoys writing for GreenPacks.org in her spare time. Caroline takes great pride in her work, and loves being able to share her knowledge with others through her writing.