Dark Knight produces blue flowers that are strikingly bigger than other Caryopteris varieties. Its intense blue flowers combine beautifully with its green, light grey leaves. Blue Empire also stands out for its fast growth and bushy habit.

Dark Knight prefers a location in full sun, in well-drained and fertile soil. Roots are winter hardy to USDA Zone 5, top growth is hardy to USDA Zone 7. It reaches a height of 40" and a width of 24". Blue Empire is perfect as solitary on balcony or patio, in perennial borders, and in mixed containers. Bees and butterflies love the gigantic flowers of Dark Knight! Blooms in late summer and into fall.

Arrives to you in a gallon-sized pot.