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).
Answer #1 Â· John Heider's Answer Â· Hi Linda-There are a few things that can cause yellowing of leaves on your Hydrangea. Nitrogen, or iron deficiencies can cause yellowing. The hydranges likes a more acid soil and if the pH level goes up (more Alkaline) the amount of iron in the soil is less available to your plant.