Sounds like a N deficiency to me if it's just the bottom leaves and if they aren't curling or anything.

You can add N to soil by using some slow release fertilizers that are high in Nitrogen. You can tell the nitrogen content of a fertilizer by looking at the three big numbers on the bag (also known as the NPK; nitrogen, phosphorus, potassium). If you are going to general fertilizer, use slow release fertilizer so it won't burn your plants. Also, though human urine is full of soluble nitrogen, I wouldn't pee on my plants because I wouldn't want them to absorb my piss. In the end, it is your decision.

If you want a super easy way to grow soilless, search "hempy buckets" on this site.

Peace,

SMG
SauceeMcGee Reviewed by SauceeMcGee on . Help Please 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 Rating: 5