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).
Specially formulated hydrangea fertilizer is available but isnât really necessary. A good all purpose 12-4-8 to 10-10-10 composition will provide all the fertilizing hydrangeas need. Either a chemical source or organic matter can be used successfully. discussion of how to fertilize hydrangeas wouldnât be complete without mentioning the addition of small amounts of sulfur or lime when fertilizing to change hydrangea color. Hydrangeas treated with sulfur will remain or turn blue. Lime results in pink and a change to either color takes time.