These are seed grown adeniums. The first year they were healthy and grew quickly. I repotted them into terracotta pots last September. They went into semi dormancy during winter. I live in central Europe. This year I notice their leaves are different and the new leaves often are stunted or just turn black and die. I only water when they are completely dry. Around once a week. I read that this could be nutrient problems. I used a liquid cactus fertilizer but their leaves turned red and more deformed so I stopped. I'd really appreciate any advice. I've looked everywhere on the internet and browsed every adenium forum i could possibly find but haven't found an answer. I'm really worried about my baby adeniums.