The Morton Arboretum

Lisle – October 14, 2026 -- ArbNet, the accreditation program run by The Morton Arboretum, has reached 1,000 accredited arboreta after adding Kórnik Arboretum in Kórnik, Poland, and the network has doubled in the last five years alone.

Kórnik is the first ArbNet-accredited arboretum in Poland. ArbNet recognized it at level IV, the highest tier, at the Oct. 12 "Trees and Forests in a Changing Environment" conference. The Institute of Dendrology of the Polish Academy of Sciences, which oversees the arboretum, hosted the event. The program is now in its 15th year and describes itself as the only international accreditation scheme specific to arboreta.

Poland becomes one of 44 countries with an ArbNet-accredited arboretum

Newly welcomed countries this year include Bermuda, Denmark, Ecuador, Indonesia and Madagascar. Cayo Levantado Arboretum in Samaná Bay, Dominican Republic, was also recently accredited.

Lisle, Ill. – September 19, 2026 -- The Morton Arboretum's "Green City Rising: People and Trees Thriving Together" concept was named a co-winner of the Horizon Lines: Visions for Chicago 2050 competition, World Business Chicago announced Sept. 15 at the City Club of Chicago.

Arboretum plan beat nearly 200 submissions to reach six finalists

"Green City Rising" reimagines Chicago as a connected network of tree-centric green spaces designed to give every neighborhood a healthy tree canopy by 2050. Landscape architecture firm MKSK was named the other co-winner for its "Wonderways!" proposal to convert Chicago's boulevards into a network of climate commons.