Does anyone know why the eddges of my leaves are c...

Hi @William137! Well, heat + high relative humidity usually lead to these symptoms. Either your lamp-to-plant distance is too short, or your airflow is not good enough. Try to have a slight and continuous breeze onto your babies and maybe raise your light up since you're currently having hot temperatures. Lowering the relative humidity might help but that's not the main priority (try to control heat+airflow first). Also, since you're growing in coco, your 5.0 pH level is a bit acidic, try to stick to the optimal pH range for coco, 5.3~5.8. The first weeks are the most important ones, especially with autoflowering strains, so try to react as fast as you can, keep us up-to-date and happy growing 👊