Color: Purple Flower Size: 4-6″ (10-15cm) Flowering Period: July-Sept Mature Height: 8-12′ (2.5-3.5m) Pruning Group: C Planting Aspect: Sun/ Partial Shade USDA Zone: 3 Suitable For Container: Yes Foliage: Deciduous Price Group: Standard About Romantica This variety has a profusion of dark violet purple 4-6″ (10-15cm) flowers with yellow stamens. The blooms are produced from July to September on a compact 8-12′ (2.5-3.5m) plant. Pruning group C.