Updated: July 3, 2023

Hydrangeas are beautiful flowering plants that can add a touch of elegance and charm to any outdoor space. With their large, showy blooms and vibrant colors, they are a popular choice for gardens and landscapes. However, growing hydrangeas outdoors requires some careful planning and attention to detail. In this article, we will discuss the steps you need to take to successfully grow hydrangeas outdoors.

Choose the Right Variety

The first step in growing hydrangeas outdoors is to choose the right variety for your climate and soil conditions. There are several different types of hydrangeas, each with its own specific requirements. Some common varieties include Bigleaf hydrangeas (Hydrangea macrophylla), Oakleaf hydrangeas (Hydrangea quercifolia), and Panicle hydrangeas (Hydrangea paniculata). Research the different varieties and select one that is best suited for your region.

Select the Ideal Location

Hydrangeas thrive in locations with partial shade. They prefer morning sun and afternoon shade, as direct sunlight can scorch their delicate blooms. Choose a spot in your garden that receives at least 4-6 hours of sunlight per day but is also protected from harsh afternoon sun. Additionally, make sure the soil in the chosen location is well-draining and rich in organic matter.

Prepare the Soil

Before planting hydrangeas outdoors, it is important to prepare the soil properly. Hydrangeas prefer slightly acidic soil with a pH level between 5.5 and 6.5. Test the soil in your chosen location using a soil testing kit available at most garden centers or through your local agricultural extension office. If the pH level is too high, you can lower it by adding sulfur or peat moss to the soil. If the pH level is too low, you can raise it by adding lime. Additionally, enrich the soil with compost or well-rotted manure to improve its fertility and drainage.

Planting Hydrangeas

Once the soil is prepared, it’s time to plant your hydrangeas. Dig a hole that is twice as wide and just as deep as the root ball of your plant. Gently remove the hydrangea from its container and place it in the hole, making sure that the top of the root ball is level with or slightly above the soil surface. Backfill the hole with soil, firming it gently around the roots. Water thoroughly after planting to ensure good root establishment.

Watering and Mulching

Hydrangeas require regular watering, especially during dry periods. Deeply water your hydrangeas once a week, ensuring that the water reaches the entire root zone. Avoid getting water on the leaves, as this can promote fungal diseases. Applying a layer of organic mulch around the base of the plant will help retain soil moisture and regulate temperature fluctuations. Use materials such as wood chips, straw, or shredded bark for mulching.

Fertilizing

Fertilizing hydrangeas is essential for promoting healthy growth and abundant blooms. Apply a balanced slow-release fertilizer specifically formulated for hydrangeas in early spring before new growth starts. Follow the package instructions for dosage and frequency of application. Avoid over-fertilizing, as this can lead to excessive foliage growth at the expense of flowers.

Pruning

Pruning hydrangeas is necessary to maintain their shape and encourage new growth. The timing and method of pruning depend on the specific variety you are growing. Bigleaf hydrangeas bloom on old wood, so they should be pruned immediately after flowering to avoid removing next year’s flower buds. Oakleaf hydrangeas and Panicle hydrangeas produce blooms on new wood, so they can be pruned in late winter or early spring before new growth begins. Remove dead or damaged wood, thin out crowded branches, and shape the plant as desired.

Protecting Hydrangeas in Winter

Some hydrangea varieties are more cold-hardy than others. If you live in an area with harsh winters, you may need to provide extra protection for your hydrangeas. In late fall, apply a layer of mulch around the base of the plant to insulate the roots from freezing temperatures. You can also cover the plant with burlap or a frost blanket to protect it from cold winds and frost damage.

Conclusion

Growing hydrangeas outdoors can be a rewarding experience, as these stunning plants can transform any garden into a colorful paradise. By choosing the right variety, selecting an ideal location, preparing the soil, and providing proper care and maintenance, you can enjoy the beauty of hydrangeas year after year. Follow the steps outlined in this article and watch your hydrangeas thrive and bloom abundantly in your outdoor space.