Scale have a protective dome that shields them from most sprays, which is why physical removal is highly effective. My big Monstera got infested with scale so here's my initial treatment: Creatures of Liminal Space Jackanapes Press Lucky Bamboo in Premium Ceramic Pot Bhoomi Garden Centre A Monstera Plant and a Wooden Chair Outside of a Building Free Stock Photo How to keep cats away from toxic golden pothos plant? Should I re pot my healthy rubber tree with exposed roots?