Argentine Senna Care

S. corymbosa is a tender, bushy, rounded, evergreen shrub with pinnate leaves divided into ovate to lance-shaped, dark green leaflets and corymbs of bright yellow flowers from mid- or late summer into autumn. This may be the most floriferous and lush species of this clan, which makes it a superior vigorous shrub for warm climate gardens. This plant is native to Argentina, Brazil and Uruguay where it is quite famous for its vigor and heavy flowering. It is well adapted to tropical climates, but also dry climates if watered. It makes a superior background shrub due to greater width than height if left to its natural form.This plant blooms heavily with bright yellow single flowers at the branch tips. Its flowering season spans much of the year, but bloom is most abundant from fall through winter into spring. This is typical of frost-free zones, but where it is a bit too cool at midwinter, the plant drops its leaves and ceases flowering, blooming in summer. Hard winter freezes kills it back to the roots, making it resprout each spring and then blooming in late summer. It is a chameleon in gardens, growing as a shrub, or a flowering tree if pruned, and can be espaliered onto sunny, warm walls. This plant is considered by international botanical authorities as a weed and may become invasive in certain regions.