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
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!
Do Cover Crops Really Help Soil?
Spotted Lanternfly! How do I Scout for it?
Spotted Lanternfly Egg Masses found in Amherst, Ohio in Winter of 2022.
Winter out – Spring Ahead!
It’s Maple Syrup Season……But which one in a Sugar Maple?
Will Ice Hurt Trees? The answer is Yes, No and Maybe!
Trees and Power Lines – How close is Too close?
Winter Tree ID – Part 2 – Deciduous Trees
Winter Tree ID – Part 1 – Evergreens
Fall Armyworm Conquered by Cold
Winter Annual Weeds Wipeout!
Merry Invasive Christmas Eve!
Rounding up 2021
Live Christmas Tree Selection and Care
Spotted Lanternfly Update – November 2021
ODA Issues Quarantine for Spotted Lanternfly
Spotted Lanternfly – Getting the Word Out to Young and Old!
Spotted Lanternfly infestation found in Ohio at 3 different locations. What can you do? SCOUT!
Looking for Fall renovation plants for your landscape? Consider some ‘Native’ shrubs.
Hemlock Woolly Adelgid - A 2021 Summer Update - New Find in Kent, Ohio - Portage County
Ants and Fungi work together to weaken the tree! And then..........