[SIP Gro-Tubs]

Originally Posted by BennB

If you do use urine, pee on the soil. Organisms and other process in the soil convert urea to ammonia to nitrates very quickly, so ammonia does not build up unless it is in a saturated condition.

Strange, whether you apply it on the top, or from the bottom just what is the difference. The Organisms are thru-out the media.

Besides plants feed on the ION of of the Nitorgen atom, which can be from either a Organic or InOrganic source.