Crassula management
Crassula helmsii is commonly called New Zealand Pigmyweed (or Australian Swampweed). It is an alien plant that threatens the wildlife of wetlands (see Plantlife’s account here) and last year we found it at Castle Water – see details here. This year it is still present and we sprayed it with Glyphosate in July (with Natural England’s consent). This week we have found that some survived the spraying and on wider searching we have found it is expanding, so spraying has been taking place today – we use a blue dye to see where we have already sprayed! Read the British Ecological Society’s account of non-native pond plants here.
Spraying Crassula with Glyphosate and blue dye