How to prune arrowhead 'kuwai'

Remove dead or yellowing leaves throughout summer and autumn; full cutback after first frost. Snap or cut yellowed leaves at the stem base at water level. In autumn, cut all remaining stems to the waterline or soil surface and carefully rake out corms from the substrate for harvest or replanting.

As needed through the growing season; full cutback once in autumn. Arrowhead 'Kuwai' is an aquatic perennial grown for its edible corms. It needs very little pruning. Remove yellowing or dead leaves through the growing season to keep the plant tidy and prevent disease in the water. In autumn, cut back all foliage once it dies down and harvest the corms from the mud.

Snap or cut yellowed leaves at the stem base at water level. In autumn, cut all remaining stems to the waterline or soil surface and carefully rake out corms from the substrate for harvest or replanting.