Sempervivum tectorum 'Royanum'


'Royanum' (Sempervivum tectorum) is a true queen among semps. It hails from the southwestern region of the French Alps and received the Award of Garden Merit from the Royal Horticultural Society for its beauty and its resilient growth under a wide range of climatic conditions.

This large, open rosette has robust stolons and tends to produce a lot of offsets or "chicks". Its smooth leaves can sometimes show "watermarks", or wavy lines of epicuticular wax that help it tolerate extended drought. It stands out in a planting with its apple green leaves tipped in a contrasting reddish purple.

The Latin name "tectorum" references the practice of planting hens and chicks on rooftops in medieval Europe, as they were thought to ward off lightning. While it is excellent on green roofs, you can also try planting 'Royanum' in rock gardens, in the crevices of a retaining wall, between paving stones - anywhere that has excellent drainage and gets sun in the morning and shade in the afternoon is ideal.

Color - Primary


Color - Secondary


Bloom Color

Pink Bloom

Cold Hardiness

Zone 5 (-20F)

Recommended Light Conditions

Filtered / Partial Sun

Maximum Height

Under 3"

Maximum Rosette Size


Growth Habit / Shape


Product Format

2.0" Pot

Product Format

3.5" Pot

Special Characteristic

Hard to Kill

Special Characteristic

Lots of Offsets

Special Characteristic

Easy to Propagate

Special Characteristic

Pet Safe