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@Zorro123, sorry to hear that. For this plant it was definitely a lack of water. If your plant isn't as big, you might be overwatering. Are you sure the soil is dry enough before each watering? Apart from that I would probably consider light stress, temperature and a deficiency as the issue. Since you are growing organically it's almost impossible to be nutrient burn (as long as you grow in living soil of course). Sorry for being unable to give a better and more specific answer :/

@Hattiwatti, Thanks!!