i give it blood and bone meal, disolved in water every week, and gave it ionic bloom twice, it is growing fast. do u really think it is def, my guess would be burn becouse the yellow leafs become crisp take onther look and tell me
it could be alot of things. but yeah with a def. the leaves will start yellowing from the bottom up. t could just be a lack of light gettin to the lower leafs. i know my plant started droppin the older fan leafs as it grew. i dont know much about the bone and blood meal so i dunno. but overall looks good. i would just keep an eye on it.
I would try to give it a good shot of Epsom Salt and foliar feed them with a food that is high in Nitrogen, make sure to get them dried up and spray them well the next day with pure water. During flowering yellowing is expected.