What Maryland’s Climate Does to Your Trees & Shrubs

Anne Arundel County’s warm, humid summers and heavy spring rains create sustained pressure on ornamental plants throughout the year. Understanding those regional conditions is the starting point for any effective plant health program.

• Mites cause leaf spotting, bronzing, and webbing on a wide variety of ornamentals. 
• Boxwood leafminer produces yellow spots and premature leaf drop on one of the most popular landscape shrubs in the region. 
• Crape myrtle bark scale is a sap-feeding pest that triggers black sooty mold and, in more severe infestations, can significantly stress plants and reduce their overall vigor. 

Fungal Disease & Soil Stress

High heat combined with seasonal moisture makes Maryland an active environment for fungal disease. Leaf spot, powdery mildew, and root rot can all develop when humidity stays elevated over extended periods. Heavy spring rains compound the problem by compacting soil and reducing oxygen availability to root systems, which weakens plant vigor and leaves ornamentals more vulnerable to secondary pest and disease pressure. Oak wilt is also a concern for oak species in this region, where the timing of pruning matters because exposed wounds can attract beetle vectors.

The Importance of IPM in Glen Burnie

An IPM approach prioritizes monitoring and early diagnosis over reactive, broad-spectrum chemical applications. Treatments are triggered by confirmed thresholds, not calendar dates. Catching a problem at an early stage typically requires less intensive intervention and can support better long-term plant health. EPA-registered products, applied with targeted strategies, minimize exposure to people, pets, and beneficial insects.