Control unwanted seedlings in the landscape by simply pulling out the juveniles or by transplanting to a more accommodating location. Most cassias will survive on very little water once established. In fact, over watering will trigger rank growth and a yellowing known as chlorosis. On the other hand, bear in mind that flowering and summer appearance will be enhanced by regular deep irrigation cycles. The cassias are fairly tolerant of most soils as they are native to calcareous soils of the desert and grassland areas of Australia.
Good drainage is recommended to avoid root problems.
Full or reflected sun is not a problem for these blokes. Place them in the harshest of conditions and they will thrive. Normally, very little is required in the way of nutrition. A light application of a complete liquid fertilizer will enhance growth if desired. Utilize large groupings to create the most dramatic flowering sequence.