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Tom Kimmerer, PhD

@tomkimmerer.bsky.social

I am a forest scientist, botanist, tree physiologist writing about relationships between trees and humans including climate change. Author of Venerable Trees, more books in progress. Read about trees here: https://ourtrees.substack.com.

25,712 Followers  |  4,716 Following  |  7,410 Posts  |  Joined: 05.07.2023  |  2.4474

Latest posts by tomkimmerer.bsky.social on Bluesky

Its wood properties are similar. The western tree most used for pencils is incense cedar, Calocedrus decurrens.

03.08.2025 23:51 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

It is, thank you!

03.08.2025 20:31 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Delightful as always. Thank you!

03.08.2025 20:24 β€” πŸ‘ 9    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

It's a tree with many names. The more useful a tree is to people, the more names it tends to have. That's why we use Latin names to be precise.

03.08.2025 16:34 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Most wood has some fragrance naturally, but redcedar - wood or oil - is quite distinct.

03.08.2025 16:19 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Yes, they do.

03.08.2025 15:28 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Tom Kimmerer (@tomkimmerer) I like to write by hand; it’s how I wrote my first book and, if my hand holds up, will do the same for the next books. I like fountain pens (two Lamy’s in the first picture) and I like wood pencils. ...

Pencils are wonderful writing tools. After a long dominance of the pencil industry by one tree, eastern redcedar, there has been a long absence of these pencils from the market. It is, though, the best wood for pencils. Read about redcedar and the return of cedar pencils at Our Trees.

03.08.2025 15:15 β€” πŸ‘ 40    πŸ” 12    πŸ’¬ 3    πŸ“Œ 1

You miss the point: the US and other countries made a serious effort to create a hemp fiber industry, enlisted expert farmers, invested plenty of money. It failed completely because the crop lacks sufficient income and can never compete with wood pulp. We tried, it failed. End of story.

03.08.2025 01:39 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 3    πŸ“Œ 0

Nice mug shot!

02.08.2025 23:43 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

This is an annual, predictable series of events, more pronounced in dry years (which this is not in eastern North America).

02.08.2025 23:05 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Be patient with yourself.

02.08.2025 21:31 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I’m sure you will be focused when it is on the verge of coming out!

02.08.2025 20:59 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

There are lots of technologies that we have replaced with better ones. Hemp once occupied large amounts of agricultural land which we now need for more efficient crops. When US farmers tried hemp a few years ago, they all failed.

02.08.2025 20:31 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 3    πŸ“Œ 0

Yes!

02.08.2025 20:20 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Hemp as a fiber crop has failed in every state and many countries. No amount of cheerleading will change that.

02.08.2025 19:05 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Delightful!

02.08.2025 18:38 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Kentucky farmers received subsidies to grow fiber hemp. They all lost money and nobody does it any more. The supposed advantages of hemp over trees are entirely fictional.

02.08.2025 18:00 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

Interesting. I lived in equatorial forests for some years, and trees there have interesting habits as well.

02.08.2025 17:32 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Tom Kimmerer (@tomkimmerer) As you walk among trees, you may notice that we are at the time when leaves begin to look bedraggled, with wounds, pests and pathogens, pallid colors, overall an increasingly pathetic demeanor. There ...

Look at some tree leaves on your walks. They look terrible - blotched, wounded, discolored. Leaves cannot repair themselves and begin to deteriorate surprisingly early. Read more at Our Trees.

02.08.2025 16:17 β€” πŸ‘ 66    πŸ” 16    πŸ’¬ 3    πŸ“Œ 0

Given our increased rainfall, and generally improved growing conditions for trees, this is not going to ease off.

02.08.2025 15:02 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

I’m sorry. I hope your day is better, maybe with a nap.

02.08.2025 11:29 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Delightful, Laurel, as always.

01.08.2025 21:45 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

There are male, female, and bisexual trees. It is true that for some species, like ginkgo, cities try to plant male trees. It is also true that pollen can increase allergies. Phoenix planted large numbers of eastern ornamental trees in the 1960s, and they now have lots of pollen allergies.

01.08.2025 17:06 β€” πŸ‘ 0    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Sex and the Persimmon What a single fruit can teach us about tree sex

Chanda, trees like to get laid too.

01.08.2025 16:27 β€” πŸ‘ 4    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

We were a couple for 20 years, during which we learned botany together, so there is some commonality in our work.

01.08.2025 15:58 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

Thank you Charlotte. We have a lot of interesting stuff coming up - I'll send out a brief summary tonight.

01.08.2025 15:52 β€” πŸ‘ 1    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0
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Sex and the Persimmon What a single fruit can teach us about tree sex

Tree sex is complicated. Trees can't wander into each others bedroom, so they have developed sophisticated systems using surrogates, like animals. Here is an illustrative story about sex in a single persimmon tree.

01.08.2025 15:18 β€” πŸ‘ 36    πŸ” 7    πŸ’¬ 2    πŸ“Œ 2

Such a dramatic landscape, such a dramatic tree.

01.08.2025 05:43 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

They are beautiful, not horrifying.

01.08.2025 03:58 β€” πŸ‘ 2    πŸ” 0    πŸ’¬ 0    πŸ“Œ 0

As much as I love mountain rivers, a flat river like this with its big ox-bows is irresistible.

01.08.2025 00:07 β€” πŸ‘ 3    πŸ” 0    πŸ’¬ 1    πŸ“Œ 0

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