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Editor's Picks

The oak tree in Skjomendalen © Gerhard Sørensen-Fuglem and Cecilia Piccirilli Bjerkeset
An oak grows north of the Arctic Circle in Norway
Website Editor | Aug 14, 2023
Unusual symptoms linked to phytoplasma infection in Quercus humboldtiii, Colombia © Eric Boa
Symptoms linked to phytoplasma infection found in Quercus...
Website Editor | Aug 06, 2023
Different names are being used for one species.
Website Editor | Jun 20, 2023

Plant Focus

A small but mature Alabama sandstone oak producing acorns © Patrick Thompson
A Critically Endangered dwarf oak 

Website Editor's blog

Oak Cousins in Danger

Beech tree leaf disease

Beech Leaf Disease is attacking Fagus species in North America.

Jim Conrad's Oak Notes


The IOS recently received an inquiry from Jim Conrad about a strange phenomenon he observed on a twig of a Quercus ×dysophylla in the Eastern Sierra Madre in Mexico, where what appeared to be multiple styles emerged from a bud. It turns out they may be fungal reproductive bodies.

Educational Videos on GCCO Website

Propagating oaks by cuttings

Maricela Rodríguez interviewed staff and owners at key oak collections in the UK. 

Poison Oak? Please Don't!


Angela Moskow shared some disturbing accounts of oak poisonings.

"Oaks for Everyone" in The American Gardener


An article by Tim Boland and Matt Lobdell on why oaks are "ecological warhorses"

Guy Sternberg on 'Taco', GCCO, and More—on NPR Illinois


IOS founding member and oak doyen Guy Sternberg was interviewed by Vanessa Ferguson for NPR Illinois. You can listen to the program here. During the interview, reference is made to the ortet tree of Quercus ×bebbiana 'Taco', a tree Guy spotted growing next to a Taco Bell restaurant in Springfield, Ill.

Music to Watch Oaks By


A Latvian oak enthusiast shares his composition that aims to express the idea of an oak tree.

The Acorn-ulator

Oak Photo Wins Nikon 2021 Small World Competition


And a special prize would go to anyone who could identify the species from the photo!

Oaks in a Dutch Podcast