How to Plant Azaleas Under Trees

Planting azaleas under trees can be a challenge due to the shade and root competition. However, with careful planning and preparation, you can create a stunning display of azaleas in your garden. Follow these steps to successfully plant azaleas under trees.

Choose the Right Variety of Azaleas

When choosing azaleas, it is important to select a variety that is suitable for growing in shade. Look for shade-tolerant species such as Rhododendron canescens or the hybrid ‘Girard’s Fuchsia.'

Prepare the Planting Site

The key to planting azaleas under trees is to prepare the planting site. Start by removing any weeds or grass from the area where you intend to plant. Then, use a garden fork or tiller to cultivate the soil. Be sure to loosen the soil to a depth of at least 12 inches to allow the roots of the azaleas to grow deep enough to establish themselves.

Improve the Soil

You can improve the soil by adding organic matter such as compost, leaf mold or aged manure. Mix the organic matter into the soil to a depth of at least 6 inches. This will help to improve the drainage and nutrient levels of the soil, which will benefit the growth of your azaleas.

Planting the Azaleas

When planting azaleas under trees, it is important to choose a location that is sheltered from wind and receives some morning sun. Before planting, determine the depth at which your azaleas should be planted. To do this, measure the height of the azalea root ball and dig a hole that is twice as wide and slightly shallower than the height of the root ball.

Remove the azalea from its container and gently loosen any tangled roots. Place the root ball in the hole and backfill with the soil mixture, tamping the soil down with your fingers as you go. Be sure not to plant the azalea too deep, as this can cause it to suffocate and die.

Care for your Azaleas

Azaleas require regular watering to help them establish themselves. Keep the soil moist but not waterlogged, watering deeply once or twice a week. Avoid over-fertilizing your azaleas, as too much fertilizer can burn the roots and cause damage. Instead, use a slow-release fertilizer in the spring and a balanced liquid fertilizer every 4-6 weeks during the growing season.

Prune your azaleas after they have finished flowering, removing any dead or damaged branches. This will help to promote new growth and ensure that your azaleas look their best. By following these steps, you can successfully plant azaleas under trees and enjoy a colorful display of blooms in your garden.