Bigleaf hydrangea Hydrangea 'Table' Blue - Hardy plantLarge, colourful clusters. The hydrangea 'Table Blue' (Hydrangea macrophylla) won't disappoint! Stunning blue flowers brighten up the garden or balcony. The flowers bloom from summer to autumn. Pruning is not necessary, unless the bush becomes too large. Plant the hydrangea in partial shade. The soil should be kept damp. Give it extra water during dry periods.