The larger leaves are turning yellow and I have been picking them off. Only tap water offered this week. A couple of times it was 7 liters of water other days just a couple of liters. The purple plant has out grown the green plant by being almost twice the size.
some work on the soil would be great, like adding Humus (worm poo), like 10kg over the first 20cm of soil, and some cover like chopped leaves. etc. That would increase the amount of roots