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
Callery Pear Eradication? Now is a great time to tag for removal.
What is that dark green circle of grass in my lawn? Fairy Rings.
Prescribed Burn in Erie County a Great Success
Huron Elementary 3rd and 4th graders get firsthand experience with Spotted Lanternfly
Christmas is over. What should I do with my tree, wreath, or swag?
A Partridge in a Pear Tree. So, what’s wrong with that?
I bought a “Live” Christmas tree. What’s the best way to take care of it.
Fall Lawn Care – Putting your lawn to bed for Winter.
Christmas! Too early to start thinking about a “Live” Tree? Maybe not!
When you think of Tree Trimming, Think Safety First, Cost Second!
Ohio Invasive Plant Council hosts Annual Research Conference
My evergreens are turning brown. Are they Dying?
Local Tree Care Company keeps Worker Safety First!
Corso’s staff gets trained to scout for Spotted Lanternfly
OGIA concludes the last Walk-about of the Season for 2023
Visiting Angels enjoy Walk-about at Miller Nature Preserve
Spotted Lanternfly found in Erie County
Spotted Lanternfly. THEY DON’T BITE!
Is my Evergreen Dead? Can I save it?
What the ‘HAIL’ happened to my tree?
Rainwater Mitigation – Is it effective?
Why do Trees Bleed?
Christmas in July!
Spotted Lanternfly 4th instar nymphs present at St Joseph Cemetery (Cleveland).
What’s happening to the plants under power lines?
Ohio Green Industry Association Hosts Walk-about at Schedel Arboretum and Gardens.
Cedar Point Thrills! Not just Roller Coasters.
Blue Spruce showing sign of the ‘Blues', top to bottom!
More abuse of Trees……………………….You’re Killin’ me Smalls!
Rain! Finally! Never so happy to see it!