Black Walnut Toxicity
Black walnut trees produce a toxic substance (called juglone) that prevents many plants from growing under or near them. Learn more about this compound and how to work around it in this factsheet.
Deciduous Trees & Shrubs
Trees and shrubs are the backbone of our landscapes. Properly placed and well-maintained landscape plants help conserve energy, provide shade, increase the property values, attract wildlife, offer privacy and help us create peaceful outdoor living environments. Many trees and shrubs also exhibit showy flowers, vibrant fall foliage colors, and edible fruits. Learn from our publications and fact sheets about selecting, planting and maintaining trees and shrubs in Wisconsin landscapes.
Featured Tree & Shrub Articles
Choosing the Right Landscape Plants: Factors to Consider
Plant selection is one of the most important decisions a gardener, landscaper or designer makes. Learn more about selecting plants in this publication.
Is My Ash Tree Worth Treating for Emerald Ash Borer?
When should I treat my ash tree for EAB? This factsheet addresses some of the most frequently asked questions regarding the treatment of ash trees for EAB, and the removal and disposal of infested trees.
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Articles
Ash Flower Gall
Tiny eriophyid mites can cause male flowers and leaf distortions on ash trees. While unsightly, tree health is not adversely affected. Learn more here.
Bacterial Blight
Bacterial blight is a disease of Chinese, Japanese, Persian and common lilac, as well as apple, pear, plum and cherry. This factsheet describes symptoms and management of this common disease.
Ash Yellows
Ash yellows is a chronic disease of ash trees, especially white ash, causing unusual leaf growth and witches brooms. It can also affect lilacs. Learn about this unusual disease in this factsheet.
Black Knot
Black knot is a disfiguring and potentially lethal disease of trees and shrubs in the genus Prunus, such as plums and cherries. This factsheet describes symptoms and management.
Controlling Carpenter Ants
Large black ants in your home may be carpenter ants. This helpful publication will help you identify and control these household pests.
Sudden Oak Death
Sudden oak death (aka Ramorum) is mostly in California, but can be spread on a variety of nursery plants. This disease should be reported immediately. Learn what to look for in this factsheet.
Eastern Redbud, Cercis canadensis
Need a small tree with spring flowers and interesting structure? Unless you live way up north eastern redbud may fit the bill. To learn more about Cercis canadensis, read this article…
The Basics of Micro Irrigation
Micro irrigation has numerous advantages in greenhouses, orchards, vineyards, fields, lawns, and gardens. Learn about components of micro irrigation systems and benefits and drawbacks these systems provide.
Star Magnolia, Magnolia stellata
If you want a small tree or large shrub with large, showy white or pink flowers in early spring, star magnolia is a great choice. Read more about Magnolia stellata in this article…
River Birch, Betula nigra
Betula nigra is a tall native tree that makes a great ornamental for large spaces because of its graceful form and attractive bark. To learn more about river birch, read this article…
Daphne xburkwoodii ‘Carol Mackie’
‘Carol Mackie’ daphnea is a medium-sized shrub with fragrant flowers in spring and attractive, variegated foliage the rest of the growing season. To learn more about this low-maintenance plant, read this article…
