Joe Di Giacomo

'Cornel Pink' Rhodendron

‘Cornell Pink’ Rhododendron at Laurelwood Arboretum

One of the earliest blooming rhododendrons in Laurelwood Arboretum is ‘Cornell Pink’ which is known as a truly pink form of R. mucronulatum. The species R. mucronulatum has flowers that appear in late winter or early spring often on the bare branches before the foliage unfurls. Its native geographic region is Korea, China, and Japan.  …

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How Rhododendrons Protect Themselves in Cold Weather

Have you ever wondered why the leaves of your rhododendrons curl up in very cold weather? You may observe that the leaves on your plants are drooping down and curling up. Is something wrong with these plants? Do not panic. What you are observing is the plant protecting itself. They practice thermotropism. Thermotropism or thermotropic movement …

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R. ‘Paul Vossberg’

Rhododendron Legacy at Laurelwood Arboretum

Joseph Di Giacomo, Master Gardener and chairperson of the Friends of Laurelwood Arboretum Rhododendron Study Team, will share information about the legacy of John and Dorothy Knippenberg and the development of the rhododendron gardens at Laurelwood Arboretum. Click here to watch the Wayne Public Library / Laurelwood Arboretum presentation. R. ‘Paul Vossberg’

Parker's Pink Rhododendron

Peak Rhododendron Bloom Time at Laurelwood Arboretum

Ever wonder the best time to see the most rhododendrons in bloom in Laurelwood Arboretum? The answer is: Now. The rhododendron collection in Laurelwood Arboretum includes more than 400 named rhododendron hybrids and species which were planted in the 1950’s and 1960’s by John and Dorothy Knippenberg, the former owners of Laurelwood Gardens who donated …

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New Propagation Greenhouse

New Propagation Greenhouse at Laurelwood

The Laurelwood Arboretum Board of Directors has named its newly completed propagation greenhouse the “Dorothy Knippenberg Propagation Greenhouse” in recognition of Dorothy’s lifetime dedication to the hybridization of rhododendrons, azaleas, and other plants.

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