<span class="link_user">@SumpfKoenigBrother</span>, I grow in coco coir. I've had some Sour Blucci that have done well, but I also had one with deficiencies. I managed to fix it, but it was by constantly monitoring the humidity, temperature, and substrate. It's very sensitive. Sour Blucci... I don't know what to tell you, I've never grown anything before except this is my first grow ever. I recommend using BAC Plant Vitality Plus; it gives them life and a different color. I would advise you to keep it well hydrated and give it time. Mine was doing badly in flowering, I started and it was fixed. I'll remove the remaining leaves, but check out the crop steering method; it has helped me a lot, along with watering several times and keeping the substrate moist (in coco coir).