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Originally Posted by knottyd  Here are pics from yesterday....Some pics show yellowing on the upper leaves but i guess its just a glare the only yellowing is on the very bottom leaves...As this is my first grow, I can't tell at what rate they are growing. I do notice its starting to pick up with new growth daily....just not sure if there on track for there age..just kinda going with the flow trying to learn to read them..well enjoy feel free to as ?'s or for more pics or just drop in to see how things are going..gonna try an up date as much as possible or as much interest is shown..lol |
for yellowing on upper growing leaves it could be a number of things...
SULFUR (S) Plants suffering from S deficiencies exhibit yellowing of new growth. Mix one tablespoon of Epsom salts per gallon of water conservatively until condition improves.
IRON (Fe) Leaves on growing shoots turn pale and veins remain dark green. pH imbalances make iron insoluble. Foliar feed with chemical fertilizer containing Fe.
For yellowing bottom leaves it could be a N,P or K deficiency among other things. if only tips are yellowing or curling under and appear brownish or burnt, its general over-fertilization in most cases.