How to Prune water soldier?
Remove runners to restrict spread

water soldier · Stratiotes aloides
Also known as: crab's claw; freshwater soldier; knight's pondwort; knight's wort; knight's woundwort; soldier's yarrow; wading pondweed; water aloe; water houseleek; water sengreen; water soldiers
This plant is listed on Schedule 9 of the UK Wildlife & Countryside Act (Northern Ireland) as an invasive non-native species. Although not banned from sale, it is an offence to plant or cause these to grow in the wild IN NORTHERN IRELAND. Gardeners possessing them should undertake measures to control them. See RHS advice on invasive non-native species for further information
Remove runners to restrict spread