Sustainability Topics

Green Roof Insallation at the Wister Center-Part 2

Photo credit: L. StiebitzNext the crane arm went up and down many times delivering pallets loaded with buckets of coarse (2-3”) crushed quarry stone (Read Part 1 here.) This larger stone is used all around the edges of the roof and around any features that protrude above the flat surface of the roof.

Here is where our hardy installation crew got a workout hauling heavy buckets of rock to all corners of the roof.  Swarthmore College gardener Bill Costello made many trips up and down the roof’s access ladder helping to load the pallets in the parking lot down below and then unload …

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Green Roof Installation on Wister Center-Part 1

DSC08370On a pleasant spring day in the final week of April, the foundations were laid for the fourth green roof at Swarthmore College. Whilst merry old England was celebrating the just completed nuptials of the Duke and Duchess of Cambridge (Will and Kate), gardeners at the Scott Arboretum were mobilizing for the arrival of some heavy equipment. A large crane was carefully maneuvered into a small parking lot and immediately employed to deliver pallets of materials skyward to the long anticipated Wister Center green roof.

The Wister Center green roof has earned a special place in the hearts of arboretum …

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Remediating Compaction on our Organic Lawn

AERA-vator. photo credit: E. Curtis

By Erin Curtis, Student Organic Lawn Coordinator

The Arboretum recently achieved another step in the transition to an organic lawn maintenance program for Mertz field. We had a demonstration of the “AERA-vator” aeration machine, which loosens highly compacted soil to induce root growth in plants and facilitate nutrient dispersal in the soil. This is a crucial step included in the protocol from our consultant, Eric T. Fleisher. Before our first batch of compost tea is applied, we need to loosen the soil so that the liquid can penetrate further and facilitate microbial activity deep into the root zone.

Not only …

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