Horticulture

Person pointing up to a tree explaining something to a crowd

Illinois Extension has a vast collection of resources addressing horticultural topics. We recognize that home and commercial horticulturalists each have unique needs, so we've cultivated a set of resources to cover everything from trees to tomatoes to tulips.

Gardening Question?

Call, email or visit any of our Extension Offices for answers to any and all gardening and lawn care questions including vegetable and fruit gardening, pest management, tree or shrub care and more. If possible, bring samples in a container or plastic bag, or take photos to help with identification and disease problems. You may also submit a question here.

Tomato Hornworm
Insects and Diseases
Not all insects are harmful, learn the difference and how to handle the ones that are. Equip yourself with the tools necessary to keep your garden and landscape healthy.
Tomatoes on the vine
Fruits and Vegetables
Resources for growing some of Illinois' most popular fruits and vegetables.
Compost pile
Composting
What and how do you compost? Have those questions answered and more with our composting resources.

Hands holding seedling and soil with nutrients from periodic table floating around
Horticulture Fact Sheets
An extensive database of resources for a variety of Horticulture topics including pests and diseases, house plants, trees, pollinators, vegetable gardening, and more.
Green sprouts in test tubes against a white background.
Plant Clinic
Plant and insect identification and diagnosis.
Blurry flower background with Gardeners Corner logo over it
Gardener's Corner
Quarterly newsletter highlighting seasonal tips and tricks for gardeners.