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The Mendota Dakota tribal community honored arborist Dan Keiser at their annual pow wow in September of 2019.
Posted Sat, 2019-10-12 02:09 in Dan Keiser's blog
I first met Bruce Bacon in 1984, and since then and through his Garden Farme, I learned about soils, fruits, salads, vegetables, organics, permaculture, sustainable ag, arbor care, tree...
Posted Sat, 2017-12-02 11:09 in Dan Keiser's blog
"What's with all the Q's?" is the opening question in Dan Keiser's documentary film, Quercophiles Abroad, which was shown again last August at the Trylon Micro Cinema in Minneapolis, Minnesota. 
Posted Fri, 2017-03-17 14:29 in Dan Keiser's blog
Dan Keiser's documentary covering his 20 years of traveling with the International Oak Society, "Quercophiles Abroad", premiered at the 8th International Oak Conference workshops. 
Posted Wed, 2016-06-08 11:13 in Dan Keiser's blog

Editor's Picks

Past IOS President Allen Coombes, Curator of Scientific Collections at Puebla University Botanic Garden, discusses leaf variability in Quercus ceirpes (still image from the documentary)
A new documentary by Maricela Rodríguez Acosta
Website Editor | Feb 17, 2026
Quercus miyagii acorn and dried leaves
A rare oak endemic to the Ryukyu Islands of Japan
Elion Jam | Feb 16, 2026
A moss-covered oak (Quercus orocantabrica) in Mata de Albergaria, Peneda-Gerês National Park, Portugal  © Amit Zoran
Steve Potter reviews a new book that features oaks
Steve Potter | Feb 11, 2026

Plant Focus

Quercus canariensis in Cornwall Park, Epsom, Auckland, New Zealand, the champion specimen in New Zealand, planted in the 1920s, 27.2 m tall with a trunk diameter of 209 cm (G. Collett pers. comm. 2026)  © Gerald Collett
Antonio Lambe shares his views on this threatened oak native to Iberia and North Africa

oakman's blog

The Mendota Dakota tribal community honored arborist Dan Keiser at their annual pow wow in September of 2019.
Posted Sat, 2019-10-12 02:09 in Dan Keiser's blog
I first met Bruce Bacon in 1984, and since then and through his Garden Farme, I learned about soils, fruits, salads, vegetables, organics, permaculture, sustainable ag, arbor care, tree...
Posted Sat, 2017-12-02 11:09 in Dan Keiser's blog
"What's with all the Q's?" is the opening question in Dan Keiser's documentary film, Quercophiles Abroad, which was shown again last August at the Trylon Micro Cinema in Minneapolis, Minnesota. 
Posted Fri, 2017-03-17 14:29 in Dan Keiser's blog
Dan Keiser's documentary covering his 20 years of traveling with the International Oak Society, "Quercophiles Abroad", premiered at the 8th International Oak Conference workshops. 
Posted Wed, 2016-06-08 11:13 in Dan Keiser's blog

The International Oak Society acknowledges the generous support of the following institutions:

Supporting Institutional Members

 

Standard Institutional Members

Rice University
San Diego Botanic Garden logo
San Diego Zoo Wildlife Alliance logo
South Carolina Botanical Garden

 

The Huntington
The John Fairey Garden