What causes yellowing leaves on Bleeding Heart Vine?

Yellowing leaves on the flowering Bleeding Heart Vine are caused by too much or too little light, overwatering, or too little fertilizer. If it is caused by too much light, move it to a shaded spot to grow; if it is caused by too little light, move it to a spot with bright indirect light to grow; if it is caused by overwatering, control watering appropriately; if it is caused by too little fertilizer, fertilize promptly, but do not apply too much at once, so as to avoid burning the roots.