Im a relatively new grower got myself some nice beans popped a couple now my green crack some out perfect green looking nice even bigger then the purple kush, the kush both seedlings started a week apart have yellowing of the veins and browning tips on some of the old leaves i started feeding some calmag as i was feeding epsom thinking it was sulphur deficiency with no luck, plants hav been feed 200-400 ppm ph perfect solution so far, have been sprayed with some neem oil mixed with insecticidal soap, growing in coco under 300w mars hydro LED, Big plant is about a month old and smaller one is a week or so behind.