Articles
Gardening Articles
Research-based horticulture information to help keep your plants and gardens thriving.
Purple Bordered Leaf Spot
Purple-bordered leaf spot (also called eye spot or Phyllosticta leaf spot) is a common, but mostly cosmetic, disease on maples. This factsheet describes symptoms and management.
Ornamental Cabbage and Kale
Susan Mahr, UW Horticulture Revised: 5/11/2010 Item number: XHT1163 What are ornamental cabbage and kale? Ornamental cabbage and kale (also known as “flowering” cabbage and kale) are in the same species (Brassica oleracea) as edible cabbage, broccoli, and cauliflower. While ornamental cabbage and kale are edible, they tend to have a bitter flavor and are […]
Orchids
Amy Gibbs* and Brian Hudelson, UW-Madison Plant Pathology Revised: 5/11/2010 Item number: XHT1035 What are orchids? Orchids belong to the orchid family (Orchidaceae) and are exotic plants grown for their beautiful, showy, and long lasting flowers. Although most species of orchids are epiphytic (i.e., naturally grow on trees or other plants), some grow on rocks […]
Impatiens Necrotic Spot
Impatiens necrotic spot is a viral disease that causes considerable losses to greenhouse-grown ornamentals and, to a lesser extent, vegetable crops.
Magnolia Scale
Magnolia scale sucks plant sap and excretes drippy, sticky honeydew which can turn black with mold growth. Learn more, including control, in this factsheet.
Guignardia Leaf Spot
Guignardia leaf spot is a fungal leaf spot that affects vining plants such as Boston ivy and Virginia-creeper, and is associated with a leaf spot and fruit rot of grape called black rot. Learn more here.
Golden Canker (Cryptodiaporthe Canker)
Golden canker is a visually distinct and common disease of alternate-leafed dogwoods such as pagoda dogwood, which can be lethal if on the main trunk of a tree. Learn more in this factsheet.
Euonymus Scale
Euonymus scale attacks evergreen shrub and vine forms of euonymus, along with privet, bittersweet and pachysandra. Learn to identify and manage euonymus scale in this factsheet.
Dutch Elm Disease
Dutch elm disease is a lethal fungal disease of native elms. This factsheet describes symptoms, spread and management of this serious disease.
Container Gardening
Live in an apartment or condo? You can still raise a garden’s worth of flowers or vegetables in pots and other containers by mastering the methods described in this publication.
Dame’s Rocket
Dame’s rocket is a Eurasian biennial belonging to the mustard family. It was introduced to North America in the 1600’s and has naturalized itself in moist, wooded areas, but can also invade open areas. Learn how to identify and control this invasive plant in this factsheet.
Citronella Ants
Phil Pellitteri, UW Insect Diagnostic Lab Revised: 5/7/2010 Item number: XHT1161 Citronella ants (Acanthomyops interjectus), also known as larger yellow ants, nest in moist soil along or under foundations. These ants feed on aphid honeydew and have no interest in human food. You may find Citronella ants when digging in the soil or when large […]
