Bluestone Tree Treated Historic Bloomington Oak
Workers applied soil treatments to a 96-year-old pin oak at the Monroe County Courthouse.
Updated on Oct. 14, 2026 in Landscaping
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Bluestone Tree service employees recently treated a 96-year-old pin oak tree located at the Monroe County Courthouse in Bloomington. The free service aimed to restore the health of the 80-foot tree by amending the surrounding soil.
Why it matters
The local soil in Bloomington is alkaline, which has prevented the aging pin oak from effectively absorbing water and essential nutrients. Proper intervention may prevent the tree from suffering the same fate as a companion oak that split during a storm two years ago.
The pin oak at the Monroe County Courthouse is approximately 96 years old and stands over 80 feet tall. Specialists performed the treatment free of charge after soil samples were sent to a laboratory in Omaha, Nebraska.
The players
Bluestone Tree
This is a tree care service provider that performs maintenance and health treatments for local vegetation.
Monroe County Courthouse
This historic government building serves as the municipal seat for Monroe County in Bloomington.
The details
Workers aerated the compacted soil at the base of the tree before applying a mixture of mulch, biochar, and compost to improve nutrient absorption. Future plans include injecting iron directly into the trunk to further support the health of the canopy.
Timeline
A companion pin oak split during a storm in 2024.
Bluestone Tree service employees treated the pin oak on October 9, 2026.
Arborists hope to see full green leaves in the tree canopy throughout 2027.
Culture Shift
This preservation effort reflects a broader shift toward maintaining mature urban canopies that provide environmental benefits to city centers. It highlights the growing importance of active intervention in protecting historical landmarks against the challenges of urban soil composition.
Visitors to the Monroe County Courthouse can expect to see ground-level improvements at the base of the historic oak as the new soil mixture integrates. The treatment ensures that residents and local officials can continue to enjoy the aesthetic and environmental benefits of this 80-foot tree.
The takeaway
Proactive soil management is critical for sustaining large trees in environments with naturally high alkalinity. Homeowners with aging trees can often improve health by aerating soil and applying organic matter like biochar and compost.
Further reading
Learn more about local vegetation care on our Bloomington landscaping page.
Source note: This article includes information reported by The Hoosier Times.
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Should local governments prioritize private partnerships to preserve historic trees on public property?
