you shouldn't spray or sprinkle the leaves once out of germination. The plant absorbs nutrients through the roots so if the leaves are exposed to liquid nutrients via spray or accidental splash they burn right away and even during germination you should only be spray misting with plain PH'd water. If you lack proper humidity in your grow space, try using an open bucket of water. if there is enough heat, the water in the bucket will slowly evaporate into the air. This will only work if the grow space is well enclosed and not too big. My grow room is approx. 6 x 10 so the bucket trick works great if my room temp is around 26C or higher.