Crassula helmsii (Australian Swamp-stonecrop)

These pages are under development - if you would like to recommend management information to include here please contact us.

Plantlife and RHS advice on alternative plants to use instead of Crassula helmsii (Australian Swamp-stonecrop)

Bridge T. (2005) Controlling New Zealand pygmyweed Crassula helmsii using hot foam, herbicide and by burying at Old Moor RSPB Reserve, South Yorkshire, England. Conservation Evidence 2, 33-34

Charlton P.E., Gurney M. & Lyons G. (2010) Large-scale eradication of New Zealand pygmy weed Crassula helmsii from grazing marsh by inundation with seawater, Old Hall Marshes RSPB reserve, Essex,England. Conservation Evidence 7, 130-133

Gomes B. (2005) Controlling New Zealand pygmyweed Crassula helmsii in field ditches and a gravel pit by herbicide spraying at Dungeness RSPB Reserve, Kent, England. Conservation Evidence 2, 62

Wilton-Jones G. (2005) Control of New Zealand pygmyweed Crassula helmsii by covering with black polythene at The Lodge RSPB Reserve, Bedfordshire, England.  Conservation Evidence 2, 63

Global Invasive Species Database - Crassula helmsii. ISSG website (March 2014)

Australian Swamp Stonecrop/New Zealand Pigmyweed (Crassula helmsii) fact sheet - Sussex Wildlife Trust

Dawson, F.H. (1996) Crassula helmsii: attempts at elimination using herbicides. Management and Ecology of Freshwater Plants - Developments in Hydrobiology, 120: 241-245

Invasive Species Compendium: Crassula helmsii (Australian swamp stonecrop) - CABI website (11 March 2014)

Managing invasive non-native plants in or near fresh water - Environment Agency 2010

Pond Check Information & Managment: New Zealand Pigmyweed (Crassula helmsii) - The Environmental Records Centre for Cornwall and the Isles of Scilly (ERCCIS) (downloaded from website March 2014)

Australian swamp-stonecrop - Crassula helmsii - Angling Trust

Gassmann, A., Cock, M.J.W., Shaw, R. & Evans, H.C.(2006) The potential for biological control of invasive alien aquatic weeds in Europe: a review. Hydrobiologia, 570(1): 217-222



PLEASE NOTE: the following links have been identified as having outdated information on the use of dichlobenil, which is no longer allowed for use in the UK

Centre for Ecology and Hydrology (CEH) information sheet on Crassula helmsii (Australian Swamp-stonecrop)


Controlling New Zealand pygmyweed (Crassula helmsii) - Suffolk Wildlife Trust

New Zealand Pigmyweed (Crassula helmsii) Invasive Species Action Plan (2009) - Invasive Species Ireland

Data sheets on quarantine pests: Crassula helmsii - EPPO (downloaded from website March 2014)

Invasive Species Aquatic Plants: Australian Swamp Stonecrop (New Zealand Pygmyweed) - Crassula helmsii - Essex Biodiversity Project website (13 March 2014)

Nault, M.E. and Mikulyuk, A. (2011) Australian Swamp Stonecrop (Crassula helmsii): A Technical Review of Distribution, Ecology, Impacts, and Management. Wisconsin Department of Natural Resources Bureau of Science Services, UB-SS-1078 2011. Madison, Wisconsin, USA

ECUS (2013) Control of New Zealand pygmyweed (Crassula helmsii) at Mochrum Lochs SSSI, phase I, 2007-2008. Scottish Natural Heritage Commissioned Report No.483

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