Hydrangea Bluebird Grows masses of beautiful silver-blue flower heads! Hydrangea Bluebird boasts rich, dark blue centres against a flurry of large, paler blue blooms. The two tones contrast in a spectacular manner that makes this shrub truly popular among many gardeners. To compliment the flower heads, this variety also grows striking green-bronze leaves which turn to darker shades of red and purple during the autumn.  Bluebird is hardy enough to manage British winter weather so it can be planted within a border, but it is also compact enough to also be grown in a patio pot. Height: 100cm (39). Spread: 100cm (39).