hydro is grown in water. it is really scientific too. Have to keep an eye on the Ph level and that sort of stuff. the high is more intense than normal nuggets. I have only had hydro once and it was 1 hit and i was high for like 4 hours. way more potent. if it was around my area that would be the only thing i would smoke. If u have a chance to buy some jump on the oppurtunity. u won't regret it.