Prune a bleeding heart plant by pinching off any wilted flowers once a week and snipping off stems after blooming. Once a year during the midsummer after the plant finishes blooming and the foliage yellows, prune the plant down to the ground in the midsummer. Every few years, pare down the plant by digging it up and dividing it. The divided parts can then be planted elsewhere.
Other than trimming a bleeding heart plant regularly, care for it by planting it in a shady area. Use rich, well-drained soil with a pH between 5.0 and 6.5. If necessary, amend the soil by working organic matter into the soil. When planting a bleeding heart, make sure that the roots are well-buried and not exposed to sunlight by digging a 4-inch deep hole. If planting more than one bleeding heart, space them at least 12 inches apart to give them plenty of room to grow.
Compost the plant once a year during the spring by adding a 1-inch layer of organic matter to the top of the soil, and then add a 2-inch layer of mulch on top of that. Water the plant twice a week during the summer. When the weather turns hot during the midsummer, the plant dies back and signals the time for pruning.