Archive for June 2011

Plants of the Week: June 27

Hydrangea arborescens ‘Invincibelle TMSpirit’ (1) JWC cropped blog

Hydrangea arborescens Invincibelle TMSpirit is a recent introduction.  Flowers, produced on new wood, open a bright pink and slowly fade to a soft rose with age.  Bloom color is not affected by soil pH.  Late winter pruning encourages strong new growth. Photo credit: J. Coceano

Stachys monieri 'Hummelo' (1) JWC

Stachys monieri ‘Hummelo’ does not look like a typical lamb’s ear.  Lavender-purple flowers rise above clumps of crisp green foliage.  The plant has proven to be reliable and disease-free and is used to great effect in mass plantings near the Cherry Border and Nason Garden. Photo credit: J. Coceano

H. quercifolia 'Snow Queen' (5) JWC

Hydrangea quercifolia ‘Snow Queen’ is a …

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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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