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).
Suggest a Correction. 1  Methods for Growing a Hydrangea Tree. 2  How to Care for Limelight Hydrangeas. 3  How to Trim Hydrangeas. 4  Preparing Hydrangea Soil.