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? 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

Articles Authored

Title Category Published on
Crimes against Trees.
Spotted Lanternfly Field Trip trains attendees to “SPOT” egg masses
Right Plant, Right Place.
The Ball Drops on Callery Pear in 2023!
OK to prune OAKS. Now’s the time to schedule!
Buying a Live Christmas Tree this year! What to do before I put it in the stand?
Christmas! Trees! Too Early?? Not if you are a grower! Or an Early shopper!
Where has all the fall color gone?
Should I stake my trees for Winter? It depends…...
Buckeyes……………..Don’t Pass the Buck!
Spotted Lanternfy - If You Detect It, Collect It!
Honeydew…….What’s it telling you?
Treating Spotted Lanternfly in Cleveland
Keeping Sweetcorn Sweet
City of Cleveland trains staff to scout for Spotted Lanternfly
Tree of Heaven Identification – Now’s the time to LOOK!
Science Saturday Spotlights Spotted Lanternfly
Merry Christmas in July!
Trapping for Spotted Lanternfly on Kelleys Island and South Bass Island! Why?
Scouting and Spraying for Spotted Lanternfly in late June 2022
Ohio Maple Bootcamp 2022
It Pays to Care for Trees – Part 2 – Plan ahead!
It Pays to Care for Trees!
Kousa Dogwoods in Full Flower. A plant worth considering!
Spotted Lanternfly Nymphs hatch in Amherst, Ohio
Spotted Lanternfly Eggs Hatch in Cleveland, Ohio
Not all Buckeyes are created equal. Which is Which??
Island Maple Syrup Project has a Sweet Outcome
Extra Eyes Needed to Look For Spotted Lanternfly (SLF) During the Upcoming Season
This Symbiotic Organism took a “Lichen” to this Tree!