As someone else mentioned, you can indeed drown the pests. Submerge the whole
plant (compost, roots leaves) in rainwater for a day or two. Two much limey
tapwater will do them in.

Cheers

Edwin
Bath.
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Tracey wrote:
Wondering if anyone can help - I have a cape sundew (drosera capensis) plant
growing on my kitchen windowsill. It is doing really well, but
unfortunately has become infested with tiny green crawlies, aphids I think.
...