Completely Arbortrary

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Completely Arbortrary Welcome to Completely Arbortrary, the podcast about trees and other related topics. What's up, Fungal Associates!

This weekly podcast is a scientific look at trees and how they affect and are affected by everything, hosted by master arborist and environmental educator Casey Clapp and his tree-curious friend and musical artist Alex Crowson. Each episode features a tree from around the world and a discussion about its unique position in culture, ecology, and history. These discussions can range from urban forestry and evolutionary biology to folk mythology and popular culture. The hard science is framed in plenty of silliness, with a casual tone, games and parody songs, and the titular arbitrary numerical rating of the tree at the end of each episode. This podcast's mission is to provide approachable science to audiences of all experience levels and reconnect people to the natural elements around them, whether deep in the forest or just outside their front door.

10/06/2026

Didya know?

03/06/2026

Did you catch our filthy episode on the Coco-de-mer last week? Find it anywhere you get your pods 🐴

21/05/2026

NEW EPISODE: White Mulberry

Hi Silk Lovers. We spun up a great new Treerun for you on the White Mulberry! Enjoy anywhere you get your pods.

JOIN THE CONE CLUB!

14/05/2026

NEW EPISODE: Das Root (Sassafras) Listen anywhere you get your pods

JOIN THE CONE CLUB at the link in the bio

07/05/2026

NEW EPISODE: Rubber

Listen anywhere you get your pods, and JOIN THE CONE CLUB!

04/05/2026

Cone Club Sticker of the Month: Jeffrey Pine by

Join up in the bio to get monthly botanical stickers mailed directly to your door!

RIP Bob Dylan you would have loved the Jeffrey pine

30/04/2026

NEW TREERUN: Cacao

Listen anywhere you get your pods!

Join the Cone Club

23/04/2026

What a whorl...

NEW EPISODE out today, anywhere you get your podcasts

21/04/2026

Who prefers their wood petrified? This Thursday, we release... TRUNKENSTEIN'S MONSTER 🌩️🧟

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