30!!!
I have 10 and that seems like a lot sometimes. There are only three that need serious pruning and I throw those prunings on top of a ongoing brush pile along the branch to the creek...I don't like them in my compost as the thorns stay thorny and painful for so long.
Many times I prune and make cuttings for friends but that does not use up all the bits and pieces.
My favorite is a Gallica that we dry petals from for tea and medicinal uses. It does not have the hooked thorns that the Rosa Van Fleet does.
I don't know the names of all of the others....one is a rosa ragosa I grew from
seed though.
I've learned to be diligent about clean up while pruning as I like to go barefoot.....
What varieties do you have?