The frame of the raised bed is lined with 200 micron builders plastic. Then a 50mm layer of scoria gravel or sand is shoveled in, which creates the reservoir.
Slotted agricultural pipe is embedded in the scoria. At one end it is joined to a right angle and half a metre of regular 50mm pvc pipe. This sticks up as the filler. A 20mm drain pipe is inserted through the frame and plastic at the level of the scoria, so the soil above doesn't get water logged.
Shade cloth is put on top of the scoria, enough to fold up the sides. Then 30cm plus of good soil/ compost is added on top as the growing medium.
Seila has done tests and says plants grow quicker and better in wick beds compared to their at grade companions. You can fill up the bottom with water, and leave it for a week. It is good to let them dry out between topping up - helps strengthen plant cell structures.
Nico also helped at the blitz. An Italian wine and vinegar maker staying in Australia for work. Think of him like a WWOOFER, he helped out with a few jobs at my house in exchange for food and board.
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