well since i don't know what im talking about because i have a low number of post which reflects how much i know about growing cannabis, i'll post a quote and a link that explains what P in NPK does...
"
Phosphorus (P) – mobile
Practical Stuff: Cannabis uses highest levels of phosphorus during the germination, seedling, cloning and flowering. "Super Bloom" fertilizers designed for flowering have high levels of phosphorus.
Technical Stuff: Phosphorus is necessary for photosynthesis and provides a mechanism for energy transfer within the plant. Phosphorus, a component of DNA, many enzymes and proteins, is associated with overall vigor as well as resin and seed production. Highest concentrations of phosphorus are found in root growing tips, growing shoots and vascular tissue.
Deficiency: A lack of phosphorous causes stunted growth. Leaves are smaller, bluish-green and often with blotches. . . . See
Indoor Marijuana Horticulture, the Indoor Bible"
[http://www.marijuanagrowing.com/print.php?op=PrintStory&sid=26]
for those who don't know what "resin" is, resin is crystals, those pearly white things that are on leaves closes to buds
![Razz :-P :-P](/styles/smilies/icon_razz.gif)