Peony Garden Treasure Peony Garden Treasure blooms from May until June, it produces large showy flowers in an exceptional yellow. Known for being the best Paeonia money can buy, this rare hybrid variety is extremely popular and makes the most incredible specimen plant and garden focal point. Peony Garden Treasure grows in height to 100cm and spreads to around 75cm, it is easy to grow and is content when positioned in a sunny yet shaded spot. This Intersectional Peony can last for up to 40 years if managed under ideal conditions! It would look stunning sitting on a pretty patio, grown in a cottage, wildlife or scented garden.