Balm-leaved Red Deadnettle, Lamium orvala

Not all Lamiums are created alike. The European species L. orvala is a tall, clump-forming plant with whorls of spotted purple-pink flowers that resemble orchids in spring. When the flowers fade the big leaves provide good contrast to grassy or fine-textured foliage in the garden. To learn more about this species of ornamental plant, read this article…

Mayapple, Podophyllum peltatum

Mayapple is a native wildflower with distinctive, deeply lobed, umbrella-shaped leaves. It forms dense colonies in open deciduous woodlands and other shaded sites.  It can be a wonderful groundcover, outcompeting most weeds in a woodland garden or naturalized setting. To learn more about this unique herbaceous perennial, read this article…

Gladiolus Disorder: Virus Complex and Aster Yellows

Viruses can destroy the value of a gladiolus crop. Serious infections have been observed throughout Wisconsin in some years. While Aster Yellows is common, it usually infects just a few gladioli scattered in plantings. This fact sheet covers the symptoms, causes, and means of control of viral and Aster Yellows infection.

Blanket flower, Gaillardia spp.

Every year, the National Garden Bureau selects one ornamental flower to feature in their “Year of the” program.  2015 is the Year of the Gaillardia. This native North American plant is both a common wildflower in places and a colorful garden ornamental, with new cultivars being developed all the time. Learn more about blanket flower in this article…

Hosta Virus X

Hosta virus X (HVX) is a viral disease that causes serious problems on many hosta cultivars, causing nursery owners and gardeners in the United States to voluntarily destroy large numbers of hosta to help prevent the spread. This fact sheet describes the symptoms and management of this virus.

Root-Knot Nematode

Root-knot nematodes are small, soilborne, worm-like organisms that infect many agricultural and horticultural plants. This publication describes the symptoms, and management of root-knot nematodes in Wisconsin.

Foliar Nematodes

Foliar nematodes are microscopic worm-like organisms that live in and on leaves (and other above-ground plants parts). Learn what to look for and how to manage foliar nematodes in this factsheet.

Iris Borer

Iris borer is the most serious pest of iris in Wisconsin. Iris plants attacked by iris borer will discolor, wilt, and die during late June and July. On close examination of affected plants, a pinkish-white caterpillar can be found feeding on the inside of rhizomes. This factsheet covers identification and control of this serious pest.

Pink Rain Lily, Zephyranthes grandiflora

If you want to grow something a little different, with grassy foliage and relatively large flowers, consider pink rain lily. This tender bulb gets its common name from the color of the flowers that burst into bloom after a good rain. Easy to grow in containers, it makes a good summer patio plant or a year-round houseplant. Learn more in this article…

Insect Pest Management for Greenhouses

This handy chart lists pesticides that are most effective against common greenhouse pests such as aphids, scales, leafminers, spider mites, and thrips. Formulation, effectiveness, cautions, and other details are provided.

Daylily Leaf Streak

Leaf streak is a common disease of daylilies, affecting daylilies wherever they are grown. Daylily varieties can vary widely in terms of their susceptibility to the disease. Oftentimes leaf streak is a cosmetic problem, causing little damage, but sometimes can cause substantial leaf loss or complete defoliation of daylily plants. Learn how to manage this disease in this factsheet.

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