HighTVanswered grow question 6 years ago As you already know the mobile nutrients in plants are able to be pulled from lower/older growth to be given to the Fresh top growth as a survival mechanism. Identifying that you problem started at the bottom is a huge help! I was also very smart of you to leave some fan leaves at the bottom when you lollipopped to leave 'detection leafs'. The primary mobile nutrients are: Nitrogen, Phosphorous, and Potassium. Magnesium is the only secondary nutrient that is mobile . In Micronutrients Chlorine, Molybdenum, and Nickel are mobile. These are the 7 Mobile nutrients in cannabis and one of them is responsible for your plant! --- After eliminating all the choices that do not cause Chlorosis(yellowing) in the leaves and the micro nutrients that comes in most tap water. That leaves us with Nitrogen, Phosphorous, Potassium, and magnesium to explain The lower leaf Chlorosis. Phosphorous and Potassium deficiencies comes with signs of Necrosis(death) on the leaf edges so we can eliminate those. This leaves us with Nitrogen and magnesium both of these explain the lower growth leaves that are fading however Nitrogen is very abundant in GH Flora micro and you are feeding plenty of it. Magnesium also causes the Chlorosis to bleed from the leaf tip edges exactly like you are seeing that Is why I am confident in saying Magnesium is the source of your MOBILE deficiency. --------------- Now about that immobile deficiency you have there! If yo look at those leafs showing Chlorosis AND Necrosis Dots all over this is from a textbook Calcium deficiency! Its an immobile nutrient show its showing symptoms directly on the growing leaves that need Calcium. This one always looks mobile because it doesn't effect the new-growth leave. The solution is to give more CaliMagic as it contains both of these deficient nutrients! You are in the normal .5-1tsp per gallon range so you can safely go up to 1tsp of calimagic per gallon! Hope this helps man! 😎
