Buy epsom salt, not the one in the drug stores, although an alternative. But hydroshops carry maganese epsom salt.

Mix 1/2 tsp per gallon of water. Foiler feed optional ( I foiler feed em with epsom salt in the morning, right after the lights come on, and some times right before the lights come off. Spray under fan leaves, through the veins


How old are ur plants?
soil, hydro?
ph?
ppm? nutes?

temp? hum?

Lights?