Flowering shrubs bring a vibrant burst of color and texture to any landscape during the summer months when many species are in full bloom. For homeowners and garden enthusiasts, maintaining the health and beauty of these shrubs is crucial to enjoying their seasonal splendor. Almstead’s Plant Health Care (PHC) Program monitors and treats plants and shrubs on a landscape for any issues that arise throughout the year.

 

Choosing the Right Shrubs

The first step is selecting the right varieties for your climate and soil conditions. Native and well-adapted species are typically more resilient and require less maintenance. Some popular summer-flowering shrubs in our region include Hydrangeas, Rose of Sharon, Rhododendron, Azalea, Butterfly Bush, and Spirea. These shrubs are known for their vibrant blooms and can be easily integrated into a variety of landscape designs.

 

Planting and Positioning

Proper planting is essential for the long-term health of your shrubs. Choose a location that provides the right balance of sunlight and shade based on the specific needs of the shrub species. Most summer-flowering shrubs prefer full sun to partial shade. Ensure the soil is well-draining to prevent root rot, which can be a common issue in areas with heavy rainfall. When planting, dig a hole twice as wide and just as deep as the root ball, and amend the soil with compost to provide essential nutrients.

 

Pruning and Deadheading

Pruning is essential for maintaining the shape and health of your flowering shrubs. For most summer-flowering shrubs, the best time to prune is in late winter or early spring before new growth starts. Remove any dead, damaged, or diseased branches to improve air circulation and prevent fungal infections. Deadheading, or removing spent flowers, encourages the shrub to produce more blooms and extends the flowering season. Regular pruning and deadheading also help keep the shrubs looking tidy and well-maintained.

 

Pest and Disease Management

Keeping an eye out for pests and diseases is crucial for the health of your flowering shrubs. Common pests include aphids, spider mites, and Japanese beetles, which can damage leaves and flowers. Integrated Pest Management (IPM) practices, such as introducing beneficial insects and using insecticidal treatments, can effectively control pest populations. For fungal diseases like powdery mildew and leaf spot, ensure proper spacing and pruning to enhance air circulation and reduce humidity around the plants. Fungicides can be used as a preventive measure if necessary. Please also see our article on summer pests and diseases.

 

Fertilizing for Optimal Growth

Flowering shrubs benefit from regular fertilization to support their growth and blooming potential. Apply a balanced, slow-release fertilizer in early spring, just as new growth begins. Follow up with a second application in mid-summer to sustain the energy for continuous blooming. Be mindful not to over-fertilize, as this can lead to excessive foliage growth at the expense of flowers. Organic fertilizers, such as compost or well-rotted manure, are excellent options for providing steady, natural nourishment.

 

Watering Practices

Watering is a critical aspect of shrub care, especially during the hot summer months. Newly planted shrubs need consistent moisture to establish their root systems. Water deeply and infrequently, ensuring the soil remains moist but not waterlogged. Established shrubs generally require less frequent watering but still benefit from deep irrigation during prolonged dry spells. Using a soaker hose or drip irrigation system can help deliver water directly to the roots, reducing evaporation and promoting deep root growth.

 

Mulching for Moisture and Weed Control

Applying a layer of organic mulch around your shrubs offers multiple benefits. Mulch helps retain soil moisture, regulates soil temperature, and suppresses weed growth, which can compete with your shrubs for nutrients and water. Spread a 2-4 inch layer of mulch around the base of the shrubs, keeping it a few inches away from the trunk to prevent rot and pest issues. Refresh the mulch annually to maintain its effectiveness.

 

Long-Term Maintenance and Renewal

Over time, even well-cared-for shrubs may begin to decline or become overgrown. Rejuvenation pruning, where old and unproductive branches are cut back to the base, can help revitalize older shrubs and encourage new growth. This should be done during the dormant season to minimize stress on the plants. Additionally, periodic soil testing and amendments can help maintain optimal soil health and fertility, ensuring your shrubs receive the nutrients they need to thrive.

 

By following these comprehensive care practices, you can maintain and enhance the beauty of your summer-flowering shrubs, creating a vibrant and healthy landscape. Regular attention will ensure your shrubs continue to bloom profusely and add stunning color to your garden throughout the summer season.

For more information or to sign up for our Plant Health Care Program, please call your local branch office.