Dormancy: Winter Height: 36″ tall Culture: Sun to Part Sun Origin: Hybrid Paeonia ‘Bartzella’ is the Rolls-Royce of yellow peonies and we are thrilled to share this splendid intersectional (herbaceous x tree) peony. This stunning deer-resistant hybrid goes dormant to ground level and buds like an herbaceous peony but has yellow flowers and foliage like a tree peony. Developed by peony breeder Roger Anderson (’86) of Wisconsin, established clumps of Bartzella peony can reach 3′ tall x 3′ wide with up to 80, 9″ wide, fully-double yellow flowers. The flowers don’t fall over in the rain like herbaceous peonies and their opening is staggered over a 6-week period. Our offerings are huge, flowering-sized plants.