Newcastle Weed Warriors


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English Holly & Blackberry Removal
November 14, 2009

English Holly
Ilex aquifolium

English holly leaves with berries - click for larger imageEnglish Holly is a broadleaf evergreen tree/shrub that is grown ornamentally in the northwestern United States and Canada but is also commonly found escaping into forests in this region. English Holly's native range is the British Isles to southern and central Europe. It is grown commercially in the Pacific Northwest and commonly used in decorations and floral arrangements as well as in landscapes.

English Holly is on the King County Noxious Weed List classified as a Weed of Concern and its control is recommended in natural areas that are being restored to native vegetation and in protected forest lands.

The Weed Warriors removed a mature Holly Tree with berries that could potentially be spread by birds and start other trees in Hazelwood Park, a 7 acre nature park in Newcastle. The nature park has trails throughout that connect surrounding neighborhoods. The youths counted 1,440 seeds from the removed tree and prevented this single tree from reproducing many trees. No wonder this tree is on the watch list as invasive that could quickly displace native habitat. Thank you, Weed Warriors!

The youths also removed Himalayan blackberry, a non-native invasive species which is now on the 2009 Washington State and King County Noxious Weed List. Throughout King County, control is recommended, especially in protected wilderness areas and in natural lands that are being restored to native vegetation.

Himalayan Blackberry -
Rubus armeniacus (syn. Rubus discolor)