Wicking beds are a high-yield, water-efficient gardening system that works well for Perth's sandy soils and dry climate. They consist of a garden bed with a water-holding reservoir directly underneath. Water and nutrients that drain below the plant roots are absorbed back up through capillary action and evaporation/condensation. This keeps the soil moist with minimal water waste. DIY wicking beds can be made cheaply and easily using materials like bathtubs, barrels or plastic-lined garden beds filled with a porous material like broken bricks to form the reservoir. Wicking beds require little watering once established and keep nutrients in the soil with low fertilizer needs.