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.
Lisle, Illinois – October 01, 2026 -- The Morton Arboretum's holiday lights exhibition Illumination opens for its 14th season on Saturday, Nov. 14, 2026, and runs through Saturday, Jan. 2, 2027, adding four new large-scale installations and a model train experience called Pine Whistle Railroad.
Tickets went on sale to Arboretum members on Oct. 1 at 9 a.m. CT and open to the general public Oct. 15 at 9 a.m. CT through mortonarb.org/illumination.
Lisle, Ill. – September 22, 2026 -- Scientists at The Morton Arboretum are tracking how a strengthening El Niño could push back peak fall foliage across the Chicago region this year, potentially compressing the color season into a shorter, more intense stretch in late autumn.
Lisle, Ill. – September 18, 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.
