Hylotelephium telephium 'Purple Emperor'

Of all the dark-leaved telephium selections, Hylotelephium telephium 'Purple Emperor' may be the one that best justifies the regal name. The foliage is a deep, saturated purple that holds remarkably well through the entire growing season — not fading to muddy brown in late summer heat, but staying genuinely purple through August and September. It grows upright to 15 to 18 inches with a tidy, self-supporting habit, and the dusty pink flowers that appear in late summer hover above the dark foliage in a contrast that garden photographers love for obvious reasons.

Zone 4 hardy and confirmed to perform well in PNW gardens across multiple seasons, 'Purple Emperor' has become a reliable staple of late-season garden design in the Pacific Northwest. Full sun brings out the deepest color; decent drainage prevents the winter root issues that afflict telephium selections in heavy, wet soils. It pairs beautifully with silver-blue grasses or the icy white rosettes of Sedum spathulifolium 'Cape Blanco' for contrasts that feel distinctly PNW in their cool, refined palette. This is the benchmark dark-leaved telephium — everything that came after is essentially trying to match what 'Purple Emperor' established.