HTIRC Mid-Season Breeding Update

by Caleb Kell, HTIRC Operational Tree Breeder

2025 Harvest Outlook

An unusually wet and rainy June and July have transitioned into an extend period of cool, dry weather which has stimulated many nut trees to begin dropping seeds two weeks earlier than usual. Combined with a lack of late spring frosts, crops of walnut and butternut are both heavy and early. Barring nursery issues, those seeking to plant HTIRC select American chestnut, black walnut, butternut and white oak seedlings in 2027 should find them in good supply.

Look for American Chestnuts in October

Going on a hike in southern Indiana this fall? Keep an eye open for American chestnut stump sprouts and seedlings, which turn a brilliant yellow color and have distinctive long, toothed leaves. If you find an American chestnut, report it on the iNaturalist app (or inaturalist.org). Every new American chestnut found and reported in Indiana allows the HTIRC to further diversify and expand its American chestnut restoration program.

An example of American chestnut fall coloration
An example of American chestnut fall coloration. Even small stump sprouts can be grafted into HTIRC seed orchards.

Two examples of American chestnut fall coloration. Even small stump sprouts like the one in the right-hand picture can be grafted into HTIRC seed orchards.