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1999: Four founders meet, form an Executive Committee, and decide to take the dream of a botanical garden for Tulsa to reality.
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2004: One-hundred-seventy acres of land in the Osage Hills eight miles northwest of downtown Tulsa are donated to the Garden by Persimmon Ridge LLC (Gentner Drummond & Tom Atherton, Principals).
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2006: The Garden receives the first of two grants totaling $2.2 million from the Oklahoma Centennial Commission.
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2007: A blessing of the land ceremony is held at the Garden with over 400 people in attendance. John Red Eagle, then assistant principal chief of the Osage Nation, conducts the ceremony.
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2007: Groundbreaking on the Centennial Phase of the Garden's development occurs, with Tulsa Mayor Kathy Taylor and board members present.
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2008: The Centennial Phase, consisting of the seven-acre Centennial Lake, the 1,200 square-foot visitor center, and the 1.5-mile access road, is dedicated.
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2009: Construction of Centennial Lake is completed. Garden opens to the public for the first time for Saturday Open Houses in April.
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2010: Garden receives $1 million grant from the Economic Development Administration for water and sewer infrastructure.
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2011: Garden hires its first full-time CEO, Todd Lasseigne.
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2012: Garden completes master plan calling for the development of 60 acres of beautiful gardens centered around Centennial Lake.
