A trio to beat the heat
This tough combination is nearly foolproof. It stands up well to intense, direct sun as long as you keep it watered. The centerpiece is a spiky 'variegatum' new zealand flax (Phormium tenax). Clustered around the edge are purple ageratum (Ageratum houstonianum) and yellow lantana (Lantana camara). The number of plants you'll need depends on the size of your container.