As mentioned in the first blog on this topic, there was a problem watering the Vorgarten, where vines, kiwis and an acacia grow. Quite apart from the time involved, it also meant a very long hose and going outside onto the road, or else spraying the water from the terrace above. Either way, not convenient.
Fortunately we had a water tap installed on the wall at the time we had the old building (the structure (which was in situ when we bought the site in 2007) renovated in 2016. I bought another Cellfast timer and sprinklers, and installed a simple ring system. Worked very effectively. I extended it to the lower part of the Vorgarten after we had the front wall and the area below it vastly improved in early 2019 – up to then the area had been a bit of a wilderness.