Vertical Wall Garden Richmond
iBlitz
Drainage gutter (colourbond black so hard to see) along bottom sub-frame rail catches water run of and then directs it to existing drainage in paving. In the ideal situation this run off would collect in a sump to then be pumped throughout the garden. Cycling water from a vertical wall back on itself results in vast changes to the pH of the water and will kill the wall if not kept in check. Watering further gardens is a better way to use this run off water.