Posted: 09/07/2014 at 14:57
I always feed and water to the roots. The roots take up water and nutrients, which are transported in xylem and phloem to the leaves. In the leaves photosynthesis takes place. No one has ever been able to explain to me by what mechanism a leaf can absorb nutrients sprayed on to it, since most leaves have a waxy layer to shed water, and openings on the underside to allow carbon dioxide in and oxygen out. Wetting the leaves is more likely to induce rots and moulds in my opinion.