i just got 2 chronic bagseeds,its either purps or jack frost and it grew so quickly i wanted to know if a plant thats already getting leaves in 3 days is fast
Bag seed usually refers to a seed of unknown strain/orign. Like out of a bag of commercialized pot. As for the plants growing fast.. I would be VERY concerned. Check your pH and your nutrient count they might grow to fast and end their life cycle very early it's called Hyper Crescere and is very serious don't let your weed plants grow too fast.
you really should be able to find that out for yourself. go to any grow journal, follow along and your observational/obvious questions will reveal their answers...