Fastbuds - Banana Purple Punch

that yellowing is from lack of chlorophyll which is perfectly normal for new growth because plants only produce chlorophyll when exposed to light so it’ll keep gettin greener. your soil mix is actually too high in phosporus but you can ride it out probably with not feeding much P if any. you shouldnt feed it yet though because its not deficient. what you see in the new growth is perfectly normal. it also looks kinda droopy are you waiting for the pots to get lighter before watering and saturating the medium with every watering. just dont water a circle around the plant because roots will not grow into dry medium and peat becomes hydrophobic when it dries. water the whole pot and wait for it to get significantly lighter but not completely dry either before watering again.