Scotts Osmocote 500g Native Controlled Release Fertiliser, Description Controlled release fertiliser that contains all the nutrients needed for healthy plant growth. Nutrients are released according to temperature - more when it's warm and plants are growing well, less when it's cold. Addition of a professional grade wetting agent enhances water absorption into the soil and helps plants take up more nutrients. Specially formulated for phosphorus-sensitive plants. Just two applications per year. Best applied in very early spring and again in late summer. Suitable for grevilleas, banksias, hakeas, boronias, stag and elkhorn ferns, waratahs and other phosphorus sensitive plants. Controlled release fertiliser. Wetting agent. Feeds for 6 months. Designed for Native Plants.