THE LEAFLET

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Why the Extended Planting Season?

We’ve had a busy and fruitful planting season this year – and we are not done yet. We’re planting in June! Typically our spring planting season runs from March-May, but …

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Think Your Ash Tree is Affected by Emerald Ash Borer?

Joining the ranks of mosquitoes as one D.C.’s dreaded pests is a small, shiny green beetle, the Emerald Ash Borer (known as EAB). These small green beetles are from East …

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Don’t Panic! Common Tree Issues and How to Treat Them

While spring and summer bring a beautiful, lush canopy, growing leaves and trees can also showcase some of the issues a tree is having. Here are some common tree issues …

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Sign Up to Prune the Famous Cherry Trees

Join Casey Trees and the National Park Service for a special opportunity to prune the summer suckers of the historic cherry trees. Suckers are an adventitious shoot which grows from …

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Think Pollen is Off the Charts this Year? You’re not wrong.

The catkins are piling up — those pendulous clusters of tiny flowers covered in pollen. And they’re on sidewalks, cars, and everywhere else.  Believe it or not, tree pollen maxed …

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Ready or Not, Here Comes Summer (and Weekly Watering Alerts!)

Just like Stella and her Grove, Weekly Watering Alerts are back! Beginning today until the last week of September we’ll be issuing weekly watering alerts for trees every Leaflet and …

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Don’t Forget to Spring Clean Outside Your House Too

Now that it looks like we’re FINALLY done with winter, let’s celebrate and get those yards ready for spring! Some things to keep in mind while you work to transform …

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Tree Climbing is Coming to American University

  Just in time for the arrival of beautiful spring weather, the Mid-Atlantic Chapter of the International Society of Arboriculture (MAC-ISA) is hosting its annual Tree Climbing Championship on the …

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Phew. This Cold Spring Shouldn’t Affect the Cherry Blossoms and Peak Bloom

Who can forget last year, when the cherry blossoms were heavily damaged by a late season cold snap. Frigid March temperatures and a snowstorm ravaged about half of our cherry …

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Pheno Forecasts Guide Pest Insect Control Actions

We’re excited to welcome a guest post from the USA National Phenology Network all about maps they released to help estimate the appropriate time to treat pesky pests that haunt our …

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Bummed Winter is Hanging Around? These Early Bloomers are Sure to Brighten Your Mood (and Yard!)

Does winter wear on a bit long for your taste? Brighten up your day with plants and trees that bloom early, so you can get the earliest start on spring. …

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Measure for Pleasure! Volunteer with Casey Trees this Spring and Summer

Join us at one of the many classes, workshops and park inventories throughout the District! Whether you want to get your hands dirty, learn more about trees, or pitch in …

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Ready or Not, Here Come the Cherry Blossoms.

Can you believe it has been exactly a year since the last time we were discussing the fate of the cherry blossoms?  (Literally, the photos in this article were taken …

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Home Stretch: One Month till Arbor Day

Now that it is finally spring, and warmer weather is (hopefully) here to stay, it’s time to turn our attention to the next big event – no not the Final …

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What’s In Store for Trees After All This Wacky Weather?

Remember when we wore tee-shirts in February and it was 70 degrees? Now that we’re melting out from a snowstorm, that seems far away. If you think you are thrown …