Buddleia Grand Cascade has huge lavender flower panicles that are 12-14 long and 4 wide with fragrant, nectar-rich flowers that cascade downward in a weeping fashion. Butterflies, bees and hummingbirds will delight in these honey-scented blossoms. Grand Cascade flowers in late summer and early fall. This new introduction from the breeding program of Walters Gardens was developed by crossing Buddleia davidii with Buddleia lindleyana. In the winter, it often dies back to the ground in colder zones but since it blooms on new wood, youll have plenty of flowers to enjoy the following year.