yes it's a common mistake or thought process with people growing autos.. They think they are suppose to be short and stubby.. Part of the reason she is so short and stubby is nutrient issues.. The best way I can explain it is.. Plant's roots grow down with water flow.. but if the medium gets too full of stuff the plant can not intake and grow properly. It's not a lock out like would happen with chemicals.. But with organics you can still overdo things by quite a bit.. Water to run off and check your tds and ph.