Leafs problem

That's a phosphorus deficiency. Treat deficiency by lowering the pH to 55. 6.2 in hydroponic units; 6 to 7 for clay soils; and 5.5-6.5 for potting soils so phosphorus will become available. If the soil is too acidic, and an excess of iron and zinc exists, phosphorous becomes unavailable. If you are growing in soil, mix a complete fertilizer that contains phospho- runs into the growing medium before planting. Fertigate with an inorganic, complete hydro- ponic fertilizer that contains phosphorus. Mix in the organic nutrients-bat guano, steamed bone meal, natural phosphates, or barnyard manure-to add phosphorus to the soil. Always use finely ground organic components that are readily available to the plants.