How many blocks does water hydrate?

How many blocks does water hydrate? For farmland to become hydrated, water must be present: up to four blocks away horizontally (including diagonally) from the farmland block. at the same level or one block above the farmland block level.

For farmland to become hydrated, water must be present: up to four blocks away horizontally (including diagonally) from the farmland block. at the same level or one block above the farmland block level.
See also  Moms lose significant sleep and free time during kids' school year, new study finds