How to Prune yellow lark's heels?
None required other than cutting back at the end of the season

yellow lark's heels · Tropaeolum polyphyllum
Also known as: yellow rock Indian cress
Grow in a sheltered scree, gravel garden, raised bed or large rock garden. Useful ground cover. Plant into well-drained, but moist soil in full sun
None required other than cutting back at the end of the season