Register Online

Read the Latest News

News Releases

Pubs Plus

Contact Us

Christopher Enroth
Extension Educator, Horticulture
University of Illinois Extension
3022 W Jackson
Macomb, IL 61455
Phone: 309-837-3939
FAX: 309-833-3019

Amanda Christenson
Program Coordinator, Hort
University of Illinois Extension
180 S Soangetaha Rd, Ste 108
Galesburg, IL 61401-5595
Phone: 3093425108
FAX: 309-342-1768



Welcome to the Unit 10 horticulture website. A great resource for gardeners and growers.

Subscribe to receive our online newsletter in your email. And don't forget to check out what our Master Gardeners and Master Naturalists are up to. Follow us on Facebook!



Here you will find several helpful resources to help you assist with horticultural questions.

Below are several resources that will help you assist with home, yard & garden problems.

Remember to use only trusted websites as references. Those websites ending in .edu and .org are more trustworthy than most .com sites


University of Illinois has several ways to assist you answer questions:


Ask a question- 

Use for general horticulture questions. Not for any type of ID or landscape plant recommendation. An example of a general hort question is "How often and when should I fertilize my lawn", or "my soil Ph is 6.8, how can I acidify it for blueberries?"


University of Illinois Plant Clinic

How to submit a Sample

Fee Schedule

Plant Clinic General Sample Form

Hot Topics


Home, Yard & Garden Newsletter

Find out what is currently going on the in the state


Home, Yard & Garden Newsletter Search feature

The problem you are seeing may have been written up in a past issue. Simply type in the main subject and see if anything comes up.


Reports on Plant Disease (RPD's)

If you see an RPD listed in the Home, Yard & Garden Pest Guide, here is where you will find a copy.


Illinois Fruit & Vegetable News

Contains a link to the Illinois Fruit & Vegetable Newsletter PLUS other information sources for fruits and vegetables.


Poisonous Plant Resources

Collection of online resources dealing with poisonous plants.

Other helpful resources:


eXtension search engine

A search site, powered by Google that will search other Extension sites. This will limit your search to only Extension resources with an .edu ending


Illinois Arborist Association

Click on "Certified Arborist" link on left for a listing of certified arborists in Illinois. You can then search by county. Always refer tree questions with possible liability issues to a certified arborist. Remember, we cannot show favoritism - please refer to the lists Illinois arborists in our area.


International Society of Arboriculture

Click on "Public Outreach" along upper topic bar. Select "Find a Tree Care Service" on the left. You will have to again click on "Find a Tree Care Service" first paragraph. I suggest you search by postal code. Please select "Show only arborists for hire". There are many arborists but not all are for hire by the public sector. Remember we cannot show favoritism – please refer to this list of certified Arborists in our area.


Illinois Climatology Site

Contains current and past Illinois weather data and information


Emerald Ash Borer Illinois Dept of Agriculture


Illinois Bees

Find out where bee hives are in a given area so if applying pesticide caller can notify beekeepers


Internet Center for Wildlife Damage Management

Great site for wildlife management across the MidWest


Living with Wildlife in Illinois

Specifically for Illinois

Interested in starting a Community Garden?

See the University of Missouri Community Garden Toolkit

Soil testing labs in Illinois

Find out what labs are nearby


2012 USDA Hardiness Zone Map

Click on any state to find out what their cold hardiness zones are.


Making Pesticide Applications in School/Community Gardens


Fact Sheets:

Oak Gall

Spruce Problems (Pest and Cultural Issues)

Horticulture Stewardship Newsletter

Check out the Horticulture Stewardship Newsletter from the last few months! Subscribe here to receive our online newsletter in your email.

Questions? Contact Amanda Christenson, Program Coordinator, Hort at

Homeowner Gardening Questions

Submit your garden and landscape questions at

Questions? Contact Christopher Enroth, Extension Educator, Horticulture at

Featured Websites

Additional Topics

4-H Youth Development Commercial Agriculture Community and Economic Development Consumer Economics Environment and Energy Stewardship Family Life Leadership and Local Government Local Food Systems and Small Farms Nutrition and Wellness