Lake and McHenry Counties
Announcements & Highlights
Celebrate International Compost Awareness Week with us!
Feed your garden on May 6, from 10-2 in Lake County, you can visit the Extension Office, 100 South US Hwy 45, Grayslake. Visit our Events page for directions and more information!
Lake County Extension Master Gardeners 2026 Plant Sale
Save the date of Saturday, May 16, 2026, for the Lake County Extension Master Gardeners Spring Plant Sale. New plant list is live!
GardenWalk 2026
Join University of Illinois Extension McHenry County Master Gardeners and McHenry County College for a self-guided tour featuring gardens in Crystal Lake, McHenry, and Bull Valley. Experience colorful gardens studded with artwork, edible plots, and more!
Upcoming Programs
Successful Vegetable Gardening
Looking to start or enhance a vegetable garden? Join Lake County Master Gardeners for this presentation, where we will cover all the basics, including planning the garden (site selection, vegetable selection, and supplies), preparing the soil, proper planting techniques, and caring for the established garden.
Northern Illinois Trees
Learn more about the value of various types of trees and planting a diverse set of trees in your landscape. We will review alternatives to invasive or non-native trees and shrubs suitable to our northern Illinois conditions. We will share best practices about how to care for and maintain your trees so they thrive.
Aquatic Macro-Invertebrate Ponding
Join the University of Illinois Extension Master Naturalists for an exciting adventure into the world of aquatic macro-invertebrates. This hands-on program offers a unique opportunity to explore the fascinating creatures living in our local ponds.
Local Resources
Workbooks and Manuals
Farm Record Books, Pesticide Applicator Training Manuals, and Workbooks are available for purchase through your local Extension Office. Please call ahead for availability.
Illinois Pollinators
Pollinators are a group of amazing insects that are vital to both plant life and human life on earth. Filter pollinator plants by color of bloom, month of bloom, sun and moisture requirements, and more!
Veggie Visions
Embark on a culinary adventure with the exciting lineup of new vegetables unveiled for the 2026 season. Learn about the unique characteristics, growing tips, and delectable uses of these fresh additions.
Connect. Learn. Grow
Plant Problems? Insects Invading? What's that Weed?
Call our Master Gardener Helpline and a U of I Extension Master Gardener will answer your questions at NO COST! From insects to pollinator gardens, crabgrass to milkweed, if you have a question, they can help!
Become a Master Naturalist
Volunteer as a Master Naturalist to facilitate conservation and restoration in your community and educate others about natural resources.
Eat well, stay active, and save money
Find tasty recipes, shopping tips, and activities to keep you and your family healthy.
4-H Youth Development
Commercial Agriculture
Consumer Economics
Family Life
Horticulture
Local Foods & Small Farms
Master Gardeners
Master Naturalist
Nutrition & Wellness
See the impact Extension makes in your community