Horticulture

The University of Wisconsin-Madison Division of Extension Agriculture Institute has moved ahead with changes that  allocates their resources in a different way than in the past. These changes will allow you and our office the ability to interact with specialists throughout the  University  of Wisconsin-Madison Division of Extension system and with other agencies in Wisconsin.

Gardening questions and tree/forest health questions should now be asked through the forms on the following links.

*Please, Do NOT bring insects and/or plant samples to the office.

Please, instead take a high quality photo of the problem to submit.

*Please, Do NOT bring insects and/or plant samples to the office.

Ask A Tree/Forest Question

Dead tree

*Please, Do NOT bring insects and/or plant samples to the office

WI Horticulture Resources

House plants in various containers

Check out our free online programs, activities you can do at home, pollinator resources and the latest Horticulture News. Including information on whether to rake or not, extending your growing season and more.


shovel in garden soil

The website has instructions on taking samples, sending your sample off and the fees for each item.

WI Master Gardener Program

Master Gardener watering garden

The Wisconsin Extension Master Gardener Program supports a network of individuals dedicated to horticulture education, service, and lifelong learning.

Food Systems

Raw vegetables in a basket

Learn tips for running and growing a successful food business from specialists and entrepreneurs! This no-cost series of online trainings is for food entrepreneurs and farm-based food businesses.

Research Bulletins & Publications

Powdery Mildew

Powdery mildews are diseases that occur on the above-ground parts (especially the leaves) of many deciduous trees and shrubs, as well as herbaceous ornamental plants, indoor houseplants, and many agricultural crops. Conifers are not affected by these diseases.

Tomato Disorders

Blossom end rot, blotchy ripening, catfacing, growth cracks, puffiness, and sunscald are discussed in this publication

Blossom End rot on green tomato

Spongy Moth Caterpillar-photo credit Bill McNee WI DNR

They’re b-a-a-a-a-ck! Those tiny little caterpillars are spongy moth caterpillars! Find them and destroy them! Northern WI is currently seeing an influx of bristly, hairy caterpillars. What are they and what can you do?

2020 Virtual Gardening Workshop

Cheq Bay Area Providers of Mulch, Compost & Topsoil

Ashland/Bayfield Counties Ag/Hort Newsletter

(For out-of-state garden inquiries, please contact your state’s respective Extension office.)

University of Wisconsin-Madison Extension Bayfield County || Courthouse-117 E 5th Street, PO Box 218 || Washburn, WI  54891

Theresa LaChappelle, Office Manager || 715-373-3285 || Email
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