Oak Open Days

UK Oak Open Days 2020 (CANCELED)

(This event has been postponed due to the ongoing COVID-19 restrictions)

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New Zealand Oak Open Days 2020 (CANCELED)

(This event has been canceled due to the ongoing COVID-19 restrictions) A two-day event featuring visits to Hackfalls Arboretum and Eastwoodhill Arboretum

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UK Oak Open Days 2019

Yorkshire Arboretum, Thorp Perrow, and Gredington Park

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Oak Open Day at Starhill Arboretum

The stateside celebration of the 25th anniversary of the IOS will take place on September 2 at Starhill Forest Arboretum in Menard County, Illinois.

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Oak Open Days at Atherstone and Thenford House, UK

We will visit David Gooder's young oak collection at Atherstone near Coventry on July 17, 2016, and Lord Heseltine's Thenford House in Northamptonshire on July 18.

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Oak Open Day in Gredington

There will be a two-day Oak Open Day event in the UK in July 2015.

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Trompenburg Tuinen & Arboretum

There will be a two-day event at Trompenburg Arboretum in The Netherlands on August 28-29, 2014.

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Oak Open Days in Starkville - West Point area, Mississippi

The International Oak Society, Mossy Oak Nativ Nurseries, and Mississippi State University cordially invite you to Oak Open Days, June 28-29, 2014 in the beautiful state of Mississippi.

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Oak Open Days in Congrove and Westonbirt

The first European event of 2014 will take place in the UK, on July 6 and 7.

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Aiken Oak and Horticultural Tour

The City of Aiken has in cultivation what is believed to be the most comprehensive collection of oaks in the United States. The week-end will be devoted to discovering this collection and more.

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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)

"Oaks: the Backbone of Mexico" – New Documentary Film

A new documentary by Maricela Rodríguez Acosta

Website Editor | Feb 17, 2026

In Search of Quercus miyagii: A Field Report from Okinawa

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

Amit Zohran's "Oakollective"

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

Species Spotlight: Quercus canariensis Willd.

Antonio Lambe shares his views on this threatened oak native to Iberia and North Africa