Give this perennial a 10-10-10 mixture or time release in the spring. It is really incredibly easy to grow. But don't expect that it will bloom much longer than the spring. You may get foliage, but you wont get anything else in the heat of the summer. It just goes dormant, so watch that you don't dig it up. My Bleeding Hearts just continue to get bigger and bigger each year. And in their little spot in my garden, they are welcome to. If you dead head this plant, it will extend the life of the flowers.
The best way to propagate this plant is to divide it. Wait until it is well established, at least 3 years before you do. It will do some self sewing, but is really not invasive.
If you are trying to create a sweet English cottage looking garden, you cant go wrong with the Bleeding Heart...