Tree peonies with non-tree peony stems?
I have had three tree peonies do well for me for about five years. They always bloom a couple weeks before my regular peonies. This year I notice some non-tree peony stems coming up from the base of my tree peonies. The foliage and buds on these errant stems seem to be similar to my other peonies. My tree peonies bloomed last week, and my regular peonies (located elsewhere in the yard) and these errant stems appear to be ready to bloom next week.
I have several questions:
Are tree peonies grown on different root stock (like roses tend to be, for those of us in northern climates)?
Should I cut the non-tree peony stems or just enjoy them?
Will they suck the vigor out of my tree peonies?
How did they get there?
Your wisdom is appreciated. Thanks!