Color: Blue Flower Size: 1-2″ (3-5cm) Flowering Period: July & August Mature Height: 2-4′ (0.5-1.5m) Pruning Group: C Planting Aspect: Sun/ Partial Shade USDA Zone: 3 Suitable For Container: Yes Foliage: Deciduous Price Group: Standard About Integrifolia Olgae This selection has 1.5″ (4cm) deep and 2″ (5cm) across mid-blue scented flowers that curve out and upwards with several flowers on each stem. Blooming time is July and August. Mature height 2-4′ (0.5-1.5m). Pruning group C.