Hi RonO,,
Welcome to the gardenhelper
I wish I could advise you on your prime
rose, It's too hot here in Tx , I've tried them,,
I would think however that if another frost is liable to happen I would wait a little longer before setting them out side. I do know they are early bloomers,, maybe you can call your nursery and ask them
when would be best to Plant outside??
I'm sure someone will come along and advice you better,, we have members from Ill,, that can help !