Take annual ageratum, "super-size" it and you have this perennial version. Eupatorium coelestinum has the same powder-blue, button-like flowers as ageratum, but in this case on top of tall, vigorous foliage that benefits from a hard pruning in summer.
Take annual ageratum, "super-size" it and you have this perennial version. Eupatorium coelestinum has the same powder-blue, button-like flowers as ageratum, but in this case on top of tall, vigorous foliage that benefits from a hard pruning in summer.
Blooms in fall through hard frost. North American native.