Fiscal year ending 2024. Filed on November 8, 2025.
4001 S Woody Mountain Road
Flagstaff, Arizona 86005
Transition Zone Horticultural Institute (EIN: 94-2788812), also known as The Arboretum At Flagstaff, has filed an IRS Form 990 since at least fiscal year 2016. In its fiscal year 2024 IRS Form 990 filing, Transition Zone Horticultural Institute, a 501(c)(3) charitable organization, reported compensation for 1 out of 16 total employees. Among the employees shown here, the average compensation is $83,438. The highest compensated employee at Transition Zone Horticultural Institute is Nathaniel O'Meara with fiscal year 2024 compensation of $83,438.
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To increase the appreciation, understanding, and conservation of plants and plant communities native to the Colorado Plateau.
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