Hi Mellow Man,

Pictures suggest you are dealing with Magnesium deficiency. To treat deficiency add 2 teaspoons of Epsom salts (magnesiun sulfate) per gallon of water/nutrient solution. For fast results, foliage spray with 1 gram Epsom salts per liter water . Greening starts at top of plant and moves downward. add same dose until symtoms disappear. Keep root zone and nutrient solution 70-75 F and your air temperature at 75F day and 65F night. Use full strength nutrient solution with pH balance 6.3 .
cnd411 Reviewed by cnd411 on . epsom salt? for low magnesium I believe I have a magnesium deffiency,the leaves on my plany mostly the fan leaves as well as other new growth have turned almost a yellow!.... I grow with sultz potting soil/mixed with half perlite my PH is around 6.8 I don't believe it's a lack of N simply because I am only one week into flowering and up to this point all the plants were really a nice forest green! which could only mean lots of N now several of the plants have yellow leaves,I should also add I don't believe the fan Rating: 5