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Since its my first grow ever, im wondering if i should feed them a small amount of cal mag and root booster now (day 5) or should i wait until they are at least one week old?
You can feed up to 300 ppm to start for sprouts if your growing in coco. A little. If your going to feed cal/mg every watering I would go with low ppm for the cal/mg. Just don't go over 300 ppm in total for the first week, then increase 100 ppm every week if your seeing good growth. Cheers