By The Old House Web



Plant balled and burlapped, balled and potted, and container-grown ornamental landscape plants.


Thinning of broadleaf and narrowleaf evergreens may be done when damaging low temperatures (below freezing) and drying winds are no longer a threat. Head back and lightly shape evergreens to remove dead and broken branches and brown, winter-injured foliage. The new growth on the plant will help you identify healthy plant parts.


Irrigate newly planted or established ornamentals any time there is less than 1 inch of weekly rainfall and plants are actively growing. Apply water at the rate of 1 quart per square foot of planting area on poorly drained soils. On well drained soils, use a half-gallon of water per square foot.


For newly planted ornamentals, spread a 2- to 3-inch layer of mulch over the soil in the bed or around trees.


Warning! Not all formulations of all recommended pesticides are labeled for all suggested uses. Buy formulations that are labeled for the specific pest problem. Follow all pesticide label directions and precautions.

When a particular pest becomes active depends on the weather conditions in your area. The pest management guide gives general guidelines for a broad geographic area. Depending on your location, a particular pest may appear early or late within the month(s) in which the pest is listed.

Pest Common Hosts Controls ------------------------------------------------------------ Insects adelgids Douglas fir Diazinon, malathion, Sevin

aphids most ornamentals Diazinon, Orthene, malathion, Sevin

beetles most ornamentals methoxychlor, Sevin

borers birch, dogwood, lilac, mountain ash, oak, poplar, willow

lace bugs amelanchier, azalea, Diazinon, hackberry, mountain malathion, ash, oak, pieris, Orthene rhododendron, sycamore

leaf miners arborvitae, birch, Diazinon, hawthorn, holly, Orthene, Sevin spruce

mealybugs taxus malathion, Orthene, superior oil

mites most ornamentals malathion,

plant bugs and honey locust malathion, leafhoppers Orthene, Sevin

scales ash, euonymus, fruit Orthene, trees, hackberry, Malathion, hawthorn, hemlock, Sevin, juniper, lilac, superior oil linden, maple, mountain ash, oak, pachysandra, pine, poplar, rose, spruce, willow

weevils arborvitae, azalea, Orthene euonymus, hemlock, pine, rhododendron, taxus

Diseases anthracnose ash, maple, oak, Benlate sycamore

bacterial blight English ivy, lilac fixed copper

Botrytis blight rose Benlate

canker and rot most ornamentals Prune out infected plant parts.

crown gall euonymus, rose Destroy infected plants.

fire blight cotoneaster, Prune out crab apple, fruit infected plant trees, hawthorn, parts. mountain ash, pyracantha

leaf spot most ornamentals fixed copper

powdery mildew most ornamentals Benlate, sulfur

scab crabapple, fruit Benlate trees, mountain ash, pyracantha

twig blight juniper Benlate

Verticillium wilt most ornamentals no effective chemical or cultural control

wetwood elm, maple no effective chemical or cultural control

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