Root. In the computer world, root refers to the top-level directory of a file system. The word is derived from a tree root, since it represents the starting point of a hierarchical tree structure.
Use a fertilizer with high levels of phosphorus. Phosphorus helps to prevent aluminum from creeping into the system of the hydrangea. Choose a fertilizer close to the ratio of 25/10/10 (Phosphorus is the middle number).
DAP (Diamonium Phosphate). Granulated universal highly concentrated nitrogen-phosphorus fertilizer. Value of nitrogen and phosphorus 18-47 increases the resistance of plants to adverse environmental factors (drought and frost), and also increases the resistance of plants to disease.AP is used to provide plants with the phosphorus they need. Because it also includes sulfur, it provides plants with their sulfur requirements. If it does not provide enough sulfur, it should be combined with the necessary amount of sulfur-containing fertilizer.