Color: Bicolor Flower Size: 6-8″ (15-20cm) Flowering Period: May June & Sept Mature Height: 6-9′ (2-3m) Pruning Group: B1 Planting Aspect: Sun/ Partial Shade USDA Zone: 4 Suitable For Container: Yes Foliage: Deciduous Price Group: Standard About Fireworks This English variety has large 7-8″(18-20cm) flowers that are blue mauve with a deep red bar and dark red stamens. Blooming time is late spring and again in late summer. Mature height 10′ (3m). Pruning group B1