They need some nitrogen.. as well as bloom .. the plants still need nitrogen during early flower and even through the whole of flower just lowering dosage every time .. hope this helps
Hola. Eso es una deficiencia de fosfosro.el humus de lombris es bueno para agregar fosforo a tu sustrato. O busca algun fertilizante rico en fosforo. No agregues de golpe. Siempre en pequeñas dosis. Suerte