Thomas deHaas

Agriculture Natural Resource Educator
OSU Extension Educator - Lake County, Ohio

Tom "bowtie" deHaas is new to extension but known for punny, not necessarily funny treatment of all topics. 

ie. How can identify a dogwood tree?................................by its BARK!

Agriculture experiences include teaching Vocational Horticulture, Ornamental Horticulture Nursery inventory, Design/Build Landscape Contractor, and Elementary, Middle and High School teacher.

 

Thomas deHaas
OSU Extension - Lake County Agriculture/Natural Resource Educator
99 East Erie Street
Painesville, Ohio 44077
440-350-2582
dehaas.2@osu.edu
440-350-2269
Profile photo - Tom deHaas

Articles Authored

Title Category Published on
New Sprayer Technologies and Best Practices Workshop a Success
Christmas in July
Queen Ann’s Lace vs. Poison Hemlock. What’s the difference?
Spray Calibration Workshop to take place in Lake County - August 4th, 2026
When is it Time to Say Goodbye?
What is that beautiful yellow flower in that farmer’s field? Not Sunflower. It is Cressleaf Groundsel.
Parking Lot Trees…. Killing them one Tree at a Time!
Staked Trees. Have you checked your trees lately?
Frost warning this weekend for parts of Ohio. Will it hurt my plants? The answer is Yes, No and Maybe!
New Organism Lurking Among the Boxwoods. A Snapping Turtle!
The Mathematics behind Invasive Species. Why can populations explode?
Ohio announced a State-wide quarantine on Spotted Lanternfly. What can I do and when?
Who’s been chewing on my plants?
Ohio Department of Agriculture Issues Statewide Quarantine to Combat Spotted Lanternfly
What are the common types of winter frost?
Exploding Trees. Fact or Fiction?
Listen to that Wind! Then take action.
What was the wind trying to tell us about our trees?
Rockefeller Greenhouse. A ‘Free’ Cleveland Christmas Display.
Governor DeWine has a ‘Real’ Christmas Tree for 2025
Where did all the Water Go? SEICHE!
Considering a Live Christmas Tree this year?
Don’t forget the Oaks!
What Happened to the Fall Color this Year?
Thinking of adding a Water Feature to your Landscape. Where do you start?
Being Patient with Impatiens pays off!
Honeydew – Sooty Mold – Spotted Lanternfly – YUK!
Yellow Jackets are Active.
Spotted Lanternfly in Erie, Lorain, and Ottawa Counties. What should you do?
Lycoris squamigera (aka Naked Lady Lily) is making an appearance.