Common phosphorus ingredients
(P)
Bat guano (very high phosphorus)
High-phosphorus bat guano is an excellent source of phosphorus that is known to not only increase flower and fruit sets, but also their size, aroma and flavor. Many brands of high-phosphorus bat guano are also a great source of calcium.
Bone meal
This excellent source of phosphorous is revered for its ability to promote strong root development. Bone meal is also a great source of calcium.
Fish bone meal
Fish bone meal is basically the same thing as bone meal except it is derived from fish. It is a great source of phosphorus and calcium.
Seabird guano
Seabird guano, like bat guano, is known to increase the amount and size of flower and fruit sets. It is also an excellent source of phosphorus and micronutrients.
Rock phosphate
Rock phosphate is a slow-releasing phosphorus source that is commonly extracted into a liquid form to increase availability. It is best used for plants that need a slow and constant release of phosphorus.
