Join the IOS today!
Since 1992 the International Oak Society has been bringing together oak enthusiasts from around the world. Born from a shared desire to exchange Quercus seed, the IOS has grown in many directions. Our mission: to further the study, sustainable management, preservation, appreciation and dissemination of knowledge about the genus Quercus and its ecosystems.
To join the IOS, you first need to subscribe to The Cupule, our free e-bulletin, by clicking on the button below. Then log in using the username and password you created and you will find instructions to join the IOS on the home page.
To read about membership rates and benefits, click on "Learn More" below.
Editor's Picks
An oak grows north of the Arctic Circle in Norway
Website Editor
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Aug 14, 2023
Symptoms linked to phytoplasma infection found in Quercus...
Website Editor
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Aug 06, 2023
Different names are being used for one species.
Website Editor
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Jun 20, 2023
Plant Focus
Latest Articles
What species of oak were planted by Royals at Penrice?
Latest news on Fagaceae conservation efforts in Taiwan
Latest Blog Posts
Chevithorne Barton hosted an Oak Study Day on July 21, 2023
Beech Leaf Disease is attacking Fagus species in North America.
The IOS recently received an inquiry from Jim Conrad about a strange phenomenon he observed on a twig of a Quercus
Shakespeare mentions oaks more than any other tree.
Hans-Cees Speel shares news of the website he created, which includes numerous photos of 64 oak taxa.
Upcoming Events
Sep 17, 2023 to Sep 24, 2023
This 7-day Tour will be led by renowned plantsman Sean Hogan of Cistus Nursery. The first part of the trip will be based in Portland with visits to gardens and day trips to nearby locations.
Oct 12, 2023 to Oct 16, 2023
The event will feature visits to important oak collections in three gardens in Texas, as well as other attractions in Houston and a tour of southwest Hill Country.
