Can You Plant Hydrangeas Under Trees?

Hydrangeas are a popular flowering plant known for their large, vibrant blooms. Many people wonder if it is possible to plant hydrangeas under trees. The short answer is yes, it is possible, but it comes with some limitations and considerations. In this article, we will discuss how to plant hydrangeas under trees and what factors to keep in mind when doing so.

Consider the Tree and its Roots

Before you start planting hydrangeas under trees, you need to take a closer look at the tree and its roots. Most trees have large, shallow roots that can make it difficult for other plants to grow nearby. When planting hydrangeas, it is important to find a spot that is far enough away from the tree's trunk and roots to avoid overcrowding and competition for water and nutrients.

Additionally, certain types of trees can have toxic roots that can harm other plants. For example, black walnut trees release a chemical called juglone that can be toxic to many plants, including hydrangeas. If you have a black walnut tree in your yard, you should avoid planting hydrangeas nearby.

Choosing the Right Hydrangeas

When it comes to planting hydrangeas under trees, not all varieties are created equal. Some types of hydrangeas do better in partial shade and can tolerate the competition for water and nutrients from the tree's roots. These include Oakleaf hydrangeas (Hydrangea quercifolia) and Panicle hydrangeas (Hydrangea paniculata). Both of these varieties have roots that can grow deeper and penetrate the tree's roots, making them better equipped to handle the harsh conditions.

On the other hand, Bigleaf hydrangeas (Hydrangea macrophylla) and Mountain hydrangeas (Hydrangea serrata) are more sensitive to the competition for water and nutrients and may not thrive under a tree. If you want to plant these types of hydrangeas, it is best to find a spot with more direct sunlight.

Prepare the Soil

When planting hydrangeas under trees, it is important to prepare the soil properly. Trees can create dry, compacted soil conditions that are not ideal for hydrangeas. To help hydrangeas thrive, loosen the soil around the tree and mix in plenty of organic matter such as compost or leaf mulch. This will help improve the soil's drainage, aeration, and nutrient content.

Water and Fertilize Regularly

Hydrangeas need a steady supply of water and nutrients to grow and bloom. When planting hydrangeas under trees, you need to be vigilant about watering regularly, especially during dry spells. Hydrangeas also benefit from regular fertilization throughout the growing season to replenish the nutrients that the tree's roots may be taking up.

Conclusion

In conclusion, planting hydrangeas under trees is possible, but it requires careful planning and preparation. Before you start planting, take into consideration the tree and its roots, choose the right type of hydrangeas, and prepare the soil properly. With the right care and attention, you can enjoy beautiful, thriving hydrangeas under your favorite shade tree.