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
Intelligent Sprayer Reduces Pesticide Use and Saves Money!
Spotted Lanternfly Traps Deployed In Ohio
Spot the Spot – Efforts Continue to Look For Spotted Lanternfly (SLF) in Ohio
ODA Operation Clean Sweep a Huge Success in Lake County Ohio
The Ins and Outs of a New Commercial Pesticide Sprayer
Tree of Heaven and Sumac Blooming: A PERFECT Time to Differentiate!
COVID-19, Ralstonia and Contact Tracing - Updated July 1, 2020!
We Stand on the Shoulders of a Giant
My Forsythias are shaped beautifully…...but few flowers!
Spring….The Good, The Bad and The Ugly
Tree of Heaven vs. Staghorn Sumac. How can you tell the difference in Winter?
A Super Time to Scout for Bagworm! (Cone in the middle)
Scouting for Scale at Solstice
Hemlock Woolly Adegid – A 2019 update
Fall Color may Indicate MORE than the approach of Autumn!
Bees love the SON!
Tree of Heaven vs. Sumac: How can you tell the difference?
Summer forecast for Lake Erie NOT so bright!
Rhododendrons – Azaleas; Reality Art!
Bug Museum Eases Fears
Dogs Gone Wild!
SADD Garden brings Happiness!
Helicopters Fly over Lake County in May!
It's the Most WONDERFUL Time of the Year............... If you're a Gardener
Magnificent Magnolias
Spring has Sprung.... APRIL FOOLS!
The Girdle you HATE to see!
Winter ‘BERRY’ Wonderland
My Pine tree is dead; what should I do? Maybe Nothing!
Fall Color: It’s not just for leaves anymore!