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
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!
Nursery Growers of Lake County Ohio promote their history 1854-2018.
Watch Your ASH!