Manganese deformities are very rare and for the most part, has something to do with an absence of zinc and iron. Perused this article and figure out how to perceive and alter a manganese lack in your cannabis plants.
Typically, the veins on the leaf stay green. The outside part of the leaf turns a dim green shading. In the event that the plant has a lot of manganese, it will bring about an absence of iron. Manganese is settled and doesn't go all through the plant.
The leaves could turn yellow between the veins, having dots of cocoa spots on the harmed takes off. It is workable for the dead chestnut spots to grow and crush the whole leaf. Something else, the leaves could section and break down.
Manganese inadequacy will stop the development of your plant. It begins to wind up yellow at the base of the leaf, then spread all the more observable, getting nearer to the tips. Not certain if your plants have a manganese inadequacy? Perused the article Nutrient lacks in pot plants for a rundown with photos of all inadequacies.