Hi folks, I've done a few grows now maybe 5-6 but I've always grown in soil, always grown autos, I've always used the same nutes (bio bizz grow, flower) from week four or whenever they were showing to need feeding, always in the same size pots 14l buckets pre drilled for drainage, the same soils always been used John innes no 2 mixed with a good helping of vermiculite, my lighting has been 600w dual spectrum HPS with a parabolic, my temps and humidity nearly constantly 19/48lights off and 24/52 lights on. I've used molasses late in the grows and a little Epsom salts, my question is, I have always had problems with inter-veinal chlorosis in two or three of my plants usually two weeks into flower, would it be harmful to my plants if I were to add cal mag at 1-1.5ml per litre to every plant every watering to keep this problem at bay? It's doing my nut in seeing the same problem every grow, lol cheers!!
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