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shrubs

Virus Diseases on Broadleaved Shrubs

Return to Common Problems of Shrubs Virus symptoms often include color changes in the leaves such as a mosaic or mottled pattern of light and dark green. Other color changes could appear as ring patterns of light green or necrotic or bleached areas. Additional symptoms include stunted or malformed...

Storm damage - Trees and Shrubs

Return to Common Problems of Trees and Shrubs Storm damage symptoms are often obvious limb breakage and leaf shredding after storms. Winter winds may cause shrubs heavily laden with snow or ice to split and have limb breakage. In many cases shrubs will bend under the weight of snow and ice, but...

Severed/Damaged Roots - Trees and Shrubs

More problems of Trees and Shrubs When roots are severed or damaged a plant may wilt, dieback or begin to decline. Roots may be severed during nearby grading and construction, especially during excavation for streets, sidewalks, footings, foundations and walls. Trenching for utilities may also...

Rust on Broadleaved Shrubs

Deciduous azaleas are the primary group of broadleaved shrubs damaged by rust. Of the six rusts in North America, the hemlock-blueberry rust, Puccininastrum vaccinii, is the most common rust infecting deciduous azaleas in Maryland.

Phytotoxicity - Trees and Shrubs

Return to Common Problems of Trees and Shrubs Phytotoxicity is caused by misuse or misapplication of chemicals on plants. Symptoms on broadleaved shrubs include leaf spotting, scorch or dead tissue and can be confused with insect or mite damage, diseases, other abiotic problems such as nutrient...

Mechanical Injury - Shrubs

Return to Common Problems of Trees and Shrubs Scattered dieback throughout a tree or shrub may be a result of mechanical damage. When equipment or machinery bangs into a tree or shrub it can crush the cambium layer or tear off bark and break branches. Repeated bumping of the trunk or stems,...

March Tree and Shrub Tips

(More tips from HGIC) For a bright vase of color indoors, the prunings of spring flowering shrubs can be brought in and placed in water to force early blooms. Forsythia, pussy willow and some blooming ornamental fruit trees work well for this. Non-flowering trees and shrubs can be pruned before new...

February Tree and Shrub Tips

Desication or winter burn often occurs in February. Photo: Minnesota DNR, bugwood.org (More tips from HGIC) February is the month when most ‘winter burn” (brown needles or leaves) occurs. Winter burn (desiccation) results from a combination of cold drying wind, fluctuating temperatures from very...

December Tree and Shrub Tips

Norway spruce. Photo: Robert Videki, Univ. of GA, Bugwood.org (More tips from HGIC) In a “normal” year in our region we do not get much ice or snow in December but if we do, try to prevent it from building up on gutters and eaves above shrubs. Heavy snow and ice loads can break branches. Using an...

October Tree and Shrub Tips

Powdery mildew on dogwood turns leaves purple. Photo: D. Clement, UME (More tips from HGIC) The dryness and heat of the summer had an effect on many trees in our area in landscapes and in the wild. Prolonged heat and drought will cause premature fall leaf drop with many tree species, and their...

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