Growing Hostas?

I have some hostas that are 2-3 years old. They come up each year, but never get any bigger. I have 3 different kinds and they all act the same so I don't think it is the type. They grow in constant shade between a large pine tree and the house. I have a feeling that the pine or cedar trees have something to do with it.

I have mulched them, fertilized them, even put new compost around and turned over the dirt. Last year they just didn't look very good, but they did not die. I have a friend that gave me some from her yard last year. They are in a different place, but there is a cedar tree there too.

By Vicki