Pest and Disease Issues That Commonly Affect Flowering Shrubs

December 2, 2025

Flowering shrubs bring beauty, color, and structure to your landscape—but they’re also vulnerable to a variety of pests and diseases. When these problems go unnoticed, they can quickly spread and weaken your plants, leaving your yard looking dull and stressed. As a trusted tree and shrub care provider in Dallas, GA, First Tree Service is here to help homeowners identify common issues early and protect their outdoor spaces year-round.

Below, we break down the most frequent pests and diseases affecting flowering shrubs, the warning signs to watch for, and proven solutions to keep your landscape thriving.


Common Pests That Affect Flowering Shrubs

1. Aphids

Aphids are tiny, pear-shaped insects that feed on plant sap. They gather in clusters on young leaves and stems.

Signs of aphid activity:

  • Sticky honeydew residue

  • Yellowing or curling leaves

  • Stunted new growth

How to manage:
Strong water sprays, neem oil, insecticidal soaps, or professional treatment can help eliminate infestations before they spread.


2. Spider Mites

These nearly invisible pests thrive in hot, dry weather—conditions common during Georgia summers.

Signs of spider mites:

  • Fine webbing around leaves

  • Tiny yellow or white speckles

  • Leaf drop in severe cases

How to manage:
Increase humidity through regular watering, prune infested areas, or call for targeted mite control services.


3. Scale Insects

Scale insects form small shell-like bumps on stems and leaves, making them tough to spot at first.

Signs of scale infestation:

  • Sticky foliage

  • Yellowing leaves

  • Weak or slow-growing shrubs

How to manage:
Horticultural oils and systemic treatments are highly effective, especially when applied during the pests’ active stages.


4. Whiteflies

These small, winged insects swarm when a branch is disturbed and feed heavily on plant juices.

Signs of whiteflies:

  • Leaf yellowing or wilting

  • Sticky honeydew

  • Mold growth on leaves

How to manage:
Regular monitoring, sticky traps, and professional insect control keep whiteflies from overtaking your shrubs.


Common Diseases That Impact Flowering Shrubs

1. Powdery Mildew

A widespread fungal disease, powdery mildew appears as a chalky white coating on leaves and stems.

Contributing factors:

  • Poor air circulation

  • Excess shade

  • Wet, humid weather

Solutions:
Prune back dense branches, increase airflow, and treat with fungicides if needed.


2. Leaf Spot Diseases

Caused by fungi or bacteria, leaf spots result in brown, purple, or black lesions on foliage.

Warning signs:

  • Speckled or blotchy leaves

  • Premature leaf drop

  • Slowed growth

Solutions:
Remove affected leaves, improve watering practices, and, if necessary, apply targeted treatments.


3. Root Rot

Root rot is common in poorly drained soil and can weaken or kill shrubs quickly.

Warning signs:

  • Wilting despite adequate watering

  • Mushy, dark roots

  • General decline

Solutions:
Improve soil drainage, avoid overwatering, and consult a professional for diagnosis and remediation.


4. Botrytis Blight (Gray Mold)

This disease thrives in damp, cool conditions and affects blooms directly.

Signs include:

  • Gray fuzzy mold on petals

  • Wilting flowers

  • Brown lesions on buds

Solutions:
Improve airflow, remove infected blooms, and treat with fungicides if needed.


How to Keep Flowering Shrubs Healthy Year-Round

Preventing pest and disease issues is easier—and more cost-effective—than treating them after they’ve become severe. Here’s how Dallas, GA homeowners can protect their landscapes:

  • Water wisely: Avoid overwatering, and aim for soil—not leaves.

  • Mulch properly: Helps maintain moisture and reduces plant stress.

  • Prune annually: Encourages airflow and removes vulnerable growth.

  • Monitor regularly: Early detection is the best defense.

  • Schedule professional shrub care: Experts can treat issues before they spread.


Protect Your Flowering Shrubs with First Tree Service of Dallas, GA

When pests or diseases threaten your shrubs, fast action matters. First Tree Service of Dallas, GA provides expert inspections, tailored treatment plans, and long-term maintenance to keep your landscape healthy, vibrant, and beautiful.

If you’ve noticed symptoms or want preventive care, contact First Tree Service today for reliable, affordable shrub and tree care trusted by homeowners across the region.


Tree Service, Tree Removal, Tree Trimming, Stump Removal


First Tree Service of Dallas Ga

Dallas, Ga 30157

404-238-7367

http://www.firsttreeservicedallasga.com/

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