To obtain a little reserve of water in the planter I used a piece of PVC pipe (4 cm diameter) sealed inside the bottleneck with rubber bands, but after some try I discover a better way to do the job, using the plastic cap of the bottle and a piece of hose.
To protect the PET bottle and roots from direct sun, I cut a juta net, found on eBay for a few euros. This natural material gives the bottle a rural/vintage look. To hold the mat I used a juta cord.
The shelf is built in cheap pine wood, 12 planks 200x35x5 cm, and 4 timbers 10×10 cm, 300 height.
Two cheap 12vdc pumps are set to lift water from the “new jersey” one minute at 7 am e one at 7 pm, enough to keep the right moisture in the planters.
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