In Northeast Ohio, where the rainfall is consistent, the clay soils are heavy, and the freeze thaw cycle shifts the ground for five months of the year, drainage is not a secondary consideration in any landscape project. It is the foundation. The patio, the walls, the plantings, and every other feature on the property depend on water being managed correctly. When it is, the landscape performs. When it is not, everything that was built on top of the drainage problem eventually shows the damage.