R. atrosanguineus has gained the Royal Horticultural Society’s Award of Garden Merit.

This plant is undemanding if given full sun or near-full sun, well-drained soil, and general care.
 It will tolerate cold temperatures, but not freezing.
 It might or might not become deciduous, depending on winter temperatures.

Propagation is by seed sown in spring, or at 15-18 °C.

Plants can be pruned in late winter to manage size and shape.
R. atrosanguineus has gained the Royal Horticultural Society’s Award of Garden Merit. 
This plant is undemanding if given full sun or near-full sun, well-drained soil, and general care.  It will tolerate cold temperatures, but not freezing.  It might or might not become deciduous, depending on winter temperatures.
Propagation is by seed sown in spring, or at 15-18 °C.
Plants can be pruned in late winter to manage size and shape.
Rhodochiton atrosanguineus