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).
5. When you get the soil pH result, it will be obvious what you need to do next: to get blue blooms, you need to amp up the soil's acidity. You can do that in a variety of ways. Organic acidifiers include sulfur and sulfate soil additives. There are also easy-to-use soil additives made specifically for hydrangeas.djust the Soil pH. When you get the soil pH result, it will be obvious what you need to do next: to get blue blooms, you need to amp up the soil's acidity. You can do that in a variety of ways. Organic acidifiers include sulfur and sulfate soil additives.