I do suggest Osmocote Plus for Orchids and the reason is the micronutrients (boron, copper, ect.) that are included in the Osmocote. When a plant is lacking in even one of the micro nutrients it slows growth and development. Different orchids have specific nutrient requirements and the Osmocote Plus takes the guess work away. It contains everything a plant might need. Give it a try and let us know how your orchids respond. Keep growing, Marianne Binetti