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Siting Seed Orchards

In a seed orchard we plant 3000 nuts representing crosses between the twenty lines of trees we pollinated and grew in our backcross orchards. We monitor them for resistance and remove the trees until only those very resistant and American chestnut looking trees remain. These trees are 15/16ths “American” in character, morphologically indistinguishable from native American chestnut trees. The key difference is that the resistance to the blight has been bred into them from the Chinese chestnut. Those few trees (twenty) remaining will intercross and produce seed that is expected to grow trees with high resistance to the chestnut blight and the ability to breed true to resistance.

Following the TACF plan. we need to find and establish up to nine seed orchards in Connecticut over the next three years. Seed orchards can be as little as one acre and likely not larger than two. The soils should be chestnut appropriate, the conditions superb for growing trees, the site should be accessible and available to fence. The key requirement is that the orchard land should have either a long-term (30-45 years) easement for growing or be under permanent conservation. Orchards typically need minimal care – similar to our backcross orchards and would be expected to provide the same benefits to the landowner our backcross orchards provide.

Land Trusts would be the ideal arrangement since the land, access, and purpose is traditionally already established. Three of our current eight back-cross orchards have Land Trust ties.

Further Reading to Assess Expectations

Interested parties should contact Bill Adamsen for more details.

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Celebrate the legacy of Rex Mann—forester, storyteller, and passionate champion for the American chestnut—with this limited edition Leave Tracks t-shirt.

Rex devoted his life to restoring forests and inspiring others to care for the land. Now, you can honor his memory and help carry his mission forward.

🌳 100% of the proceeds from every shirt go to The American Chestnut Foundation (THANK YOU!), supporting the work Rex believed in so deeply.

👉 Pre-order now through August 2: scottmann.com/store/Leave-Tracks-In-Honor-of-Rex-Mann-PREORDER-p768130686

Let’s keep walking the trail Rex helped blaze.
... See MoreSee Less

Celebrate the legacy of Rex Mann—forester, storyteller, and passionate champion for the American chestnut—with this limited edition Leave Tracks t-shirt.

Rex devoted his life to restoring forests and inspiring others to care for the land. Now, you can honor his memory and help carry his mission forward.

🌳 100% of the proceeds from every shirt go to The American Chestnut Foundation (THANK YOU!), supporting the work Rex believed in so deeply.

👉 Pre-order now through August 2: https://scottmann.com/store/Leave-Tracks-In-Honor-of-Rex-Mann-PREORDER-p768130686

Let’s keep walking the trail Rex helped blaze.

We’re excited to share a new animated video explaining TACF’s RGS program! ... See MoreSee Less

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1 CommentComment on Facebook

Transgenic American Chestnuts are still a much better option. The product of this method will always be a hybrid and that should not be the goal.

One of the greatest ecological disasters the US has ever seen. Chestnut blight wiped out the American chestnut tree in less than 50 years.⁠
A tree that once made up nearly 25% of the eastern forests was reduced to a functionally extinct species.⁠

The Asian fungus Cryphonectria parasitica was accidentally introduced into the United States in the late 1800s. While a few diseased chestnuts were noted in the 1880s and 90s, it wasn't until 1904 that the pathogen was identified in New York City. From that point, the blight spread rapidly. By 1950 the entire range had been consumed.⁠

The fungus causes cankers that spread around the trunk of the tree, girdling it and killing everything above ground. Many root systems still survive today and continue to send up shoots, but these also eventually succumb to blight. Because American chestnuts rarely survive long enough to reproduce, the species is considered functionally extinct.⁠

The American Chestnut Foundation is working to develop blight-resistant American chestnuts that can be used to restore this iconic tree to its native range. Learn more at tacf.org/about-us (link in bio)
... See MoreSee Less

141 CommentsComment on Facebook

I think I may have found an American Chestnut tucked away in a backyard

Incredibly important work…it was such a travesty for our forests!

The trees seem to still be intact outside their range in isolated areas. Theres a few large ones here in central Michigan on a peninsula and again on the Leelenau peninsula in the nw lower peninsula. I keep seeing people chime in about adult trees here and there. Seems like there's hope!

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Just another day working to bring back the American chestnut. 🌰 ... See MoreSee Less

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Yikes. Most of those pictures look like very Chinese hybrids.

I have a very old American chestnut tree that has the blight . It gets chocked off then gets new growth. It got a lot of wind this year and lost a lot of the blooms. It produces nuts still . Does anyone want to get a start of the new fruit before I move or pass way ? I’m afraid the new owners will destroy it. This was the only reason I wanted this house in the late 80’s .

Hope you are successful!!!

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Especially if you're under a canopy of American chestnuts... ... See MoreSee Less

Especially if youre under a canopy of American chestnuts...

6 CommentsComment on Facebook

Unless, of course, it's fall. Then the chestnut seed pods are falling from the trees and creating a floor covered in pins and needles so sharp that it puts sweetgum to shame. You wouldn't want to be laying under the chestnut canopy then!

I live in Barboursville, WV and wanted to know if i can buy a seedling or how i go about acquiring one! Thank you!

The SHADE TREE COMMISSION in NEW PALTZ New York is interested in planting some CHESTNUT trees on Chestnut Street (Rt. 32). We would like to receive help from you if possible. New Paltz is a historic town and in the past there were MANY Chestnut trees here, Presently there is only ONE Chestnut tree which I grew from the nut of an elegant, large tree when it was sadly cut down. If there are any Chestnut trees available, or if you have any suggestion that might help us in this quest we would be greatful. Thank you for your attention., Shelly Ottens (hishellynbobo@yahoo.com)

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