Mini Mauvette Hydrangea Arborescens ShrubsInvincibelle Mini Mauvette Hydrangea Arborescens Shrubs for Sale Online Invincibelle Mini Mauvette smooth hydrangea is unlike any hydrangea that's ever come before. Why? Because it blooms every single year, even in cold climates and is impervious to bad pruning. It's the same type of hydrangea as the classic and much loved Hydrangea Annabelle, but instead of plain white blooms, the flowers are a deep pink mauve.