Brillantaisia nitens, or Tropical Giant Sage, is a perennial herb or subshrub that can grow to almost three metres high in its native habitat, though only to around two metres in general cultivation.
It has large, lush, mid green, broad based and pointed leaves on square stems from which spikes of large violet blue, orchid-like flowers with large hooded petals are produced from spring through to autumn.
These are perfect plants for the rear of a mixed border, though they can require staking , especially if the location can become windy.