Bigleaf hydrangea Hydrangea 'Rosso Glory' Red - Hardy plantAn amazing bloom with an amazing colour! The hydrangea 'Rosso Glory' (Hydrangea macrophylla) flowers for months! The richly flowering Rembrandt hydrangea is a compact grower and grows to around 1 metre high. Hydrangeas can also be planted in a large flowerpot. You can plant the hardy hydrangea all year round, provided temperatures have not dipped below freezing. The flowers bloom in the summer and pruning is not necessary. Unless the bush becomes too