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).
Herbal remedy for heel spur. Hydrangea root capsules are found to be very effective for bone spurs. (Note that hydrangea leaves are poisonous, but the roots are not) Take 9 capsules (325 mg each.) daily until the pain is gone, then cut back to 6 capsules daily. If the pain returns, go back up to 9.