¡Ayuda! Aparición de manchas en las hojas inferiores

they need more light bro,keep it closer...much closer,they are so stretched coz of this... and give them more nutrients bro,my very good advice 4 u is buy Iguana bloom from Advanced Nutrients...impressive organic cocktail which u can use on any stage and plant will be happy and will give awesome big buds) if u use soil just give 2 ml/l from 21 day of vegetation period and increase to 4 ml/l on 6th week of flowering with indica strains.... also recommend theyr Nirvana as a desert to main dish...it includes alot of vitamins and growth gormons (its like all fruits for the man) and Piranha for the big and healthy roots...wish u have alot of a big harvests😉