Penstemon 'Raven'

Penstemon 'Raven' is a semi-evergreen perennial with dark green foliage and upright spikes of rich, velvety dark purple, tubular flowers from summer to autumn, good for borders.

Sun: Full Sun.

Soil: Well-drained.

Hardiness: H5 — down to −15°C.

Flowering: June, July, August, September, October.