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).
Step 1. Water your limelight hydrangeas deeply and thoroughly to soak the soil around the roots once each week during the summer when rainfall is less than 1 inch. Keep the soil constantly and evenly moistened at all times while the hydrangeas are actively growing.tep 1. Water your limelight hydrangeas deeply and thoroughly to soak the soil around the roots once each week during the summer when rainfall is less than 1 inch. Keep the soil constantly and evenly moistened at all times while the hydrangeas are actively growing.