Bigleaf hydrangea Hydrangea macrophylla Red - Hardy plantA beautiful plant! The hydrangea (Hydrangea macrophylla) is one of the most well known red hydrangeas. This plant will give you long lasting pleasure in the garden or on the balcony in a pot. You can plant the hardy hydrangea all year round, provided temperatures have not dipped below freezing. The flowers bloom in the summer. Pruning is not necessary, unless the bush becomes too large. Plant the hydrangea in partial shade. Keep the soil moist and