The most important part of this vertical garden is the solar powered pump of esotec. It runs two times a day when it gets lighter in the morning and when it gets darker in the evening. The pump sucks water out of a reservoir, in our case out of a pretty old wine barrel. It shifts water out of 15 drains up to 2m. You can change time of pump from 30 seconds to 12 minutes. A water-level sensor protects the motor for damage by running dry. With this watering system it is simple to realize an automatic hydroponic garden without using a timer clock.
I used Grodan culture blocks 40mmx40mmx40mm to cultivate the plants. These blocks fits optimally in the smallest rectangle shaped rain pipes I found in then hardware store.
I started with six rain pipes, the printed holder are latched into the wooden planks that covers the wall to our neighbor. You need two holder for 1m rain pipe. If you like to extend the length you need more, I think three three holders are enough for 2m pipes.
The left side of each rainpipe is closed by an end cap that you can buy, there is the inlet tube mounted with a clip.
At the end cap of the right side, a 3D printed part, is the drain to the lower rain pipe integrated. The drain of the lowest rain pipe guides the water back into the reservoir.
After days of producing the necessary parts and mounting the rainpipes I started with seeding different cultivar of picking salads. It was awesome to see the first seed leaves after only three days. Later I put cutting of peppermint in the culture blocks. This project was a great success and we will scale up the installation when it is getting a little bit warmer.