Description

General aspect and origins - Cassia didymobotrya syn. Senna didymobotrya is a shrub which is native to Eastern Central Africa. It is often grown for its yellow ornamental flowers which appear over a long period in warm climates.
Leaves - Leaves are evergreen and are 4-20 in (10-50 cm) long. They are pinnate with up to 30+ elliptic to oval leaflets.
Flowers - This plant usually blooms from late spring to early fall. The golden-yellow flowers, which are about 1-2 in (2-5 cm) wide, are grouped in 4-8 in (10-20 cm) inflorescences.

Culture

This plant should be grown indoors, or in frost-free climates. (I.e. USDA zones 10+). However, it has beeen reported to withstand brief frosts USDA zones 9b (26°F, -3°C) and even in USDA zones 9a (21°F, -6°C). In this latter case however, the plant will be frozen to the ground, and may resprout from the roots.
Soil - This plant likes well-drained soils. It can withstand occasional droughts.

Propagation

This plant can be propagated by seeds (in spring, soak the seeds 24h before sowing) or by cuttings (in summer, with half-ripe wood)