i have a few plants growing in pots on they are doing fine, however i put a few in the ground suprisingly they have been doing well too. but yesterday i went to check the ones in the ground and bottom leaves are yellow. and its just the leaves like on on each plant has yellow bottom leafs, no spots or anything. Is this a nitrogen defieciency? And if so is there a simple fix, like manure or piss or something. Any help would be appreciated. Also any links to any helpful information on hydroponics for begginers would be awesome too. Thanx in advance.
ADubb