ya i think its potassium. I'm going to flush and nute today. I have them in manure (i know it was a bad idea) and manure can produce excessive Na+ wich can bond with potassum

thanks man
harris7 Reviewed by harris7 on . Help I am only a simple grower So my leafs have some yellowing and it is moving up from the lower leafs, See pics. Iā??m thinking it is a mobile nutrient problem as the growth tip seems health. Nitrogen Def? They are under 400Watt MH and the temp is always under 84 usually at 81 F I have been feeding but not for the last few days. Rating: 5