By Nancy Penrose

Recently we installed 15 privacy trees for a client. We install a lot of privacy trees for clients, many of whom will report that they regained privacy of their property from intrusive nearby activities or neighbors.

But with this client, they reported that the 15 trees we planted for them had a surprising effect. The client discovered that their air quality improved after the trees were planted. Here’s what the client had to say:

“We live on a dirt road and we get a lot of dust when cars go around a corner that’s about 600 feet north of our property.  I’ve been monitoring this dust with a purple air sensor attached to the corner of my house for over a year.  I knew that when the humidity drops a little and when a slight wind comes out of the north, my air quality goes down quickly. In the before picture you can see a sort of tunnel right down our driveway, I knew by the wind in my face when the air quality would be bad.

“The morning your crew arrived I could feel the wind in my face and sure enough the air quality was in the 50’s (acceptable but not good). From months of experience I knew the air quality would get worse as the day went on. I was standing by the road watching the guys line the trees up and looking at my phone to see how bad the air quality rating was and instantly (no that’s not an exaggeration), instantly the air got better. The sensor said it had a reading of 53, 30 minutes prior, but the “right now” air quality was 4.  Yes 4. I spent the rest of the day watching the sensor for a bad air quality spike, but it never happened. This morning I woke up to the sound of a chain saw to the north. My neighbor was taking down one of his big Doug Firs. I knew that diesel idling, chain saw smoke, and any vehicle activity on the road would make dust. 1.3 mph wind out of the north, humidity down to 75% already. On any other day like this, the air quality would probably get into the 100’s.  Not today. Air Quality 10. Darn near perfect.  The row of new trees has redirected the airflow down the road and away from my driveway. Wow! – J.D.”

A surprising benefit from trees for this client!

Nancy Penrose is the owner of Big Trees Inc., located in Snohomish, WA in the Seattle area. The company is one of the largest tree nurseries in the Seattle area with over 120,000 trees available in over 300 varieties. They not only deliver young trees, but also mature trees in a wide range of sizes. Some types of trees available include spring flowering, deciduous, evergreen, and privacy trees. The company also does tree transplanting including large trees. Their blog can be seen at or They can be reached at 360-563-2700.

Big Trees Inc.
10928 Springhetti Rd
Snohomish, WA 98296

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