I am guessing that you are asking about NPK fertilizer.  When you say .13 of nitrogen are you looking at individual components or a fertilizer mix?  Are you trying to dilute a standard nitrogen component?  Just as important as those numbers is what’s in the potting mix.  The following website will help you better understand these factors.

https://extension.psu.edu/homemade-potting-media/

You would probably have better luck with rooting the cuttings first either in water or a propagating mix such a perlite or vermiculite.  I usually root my pothos cuttings in water first which helps them develop a good root system before planting. Also I never fertilize until the root structures are pretty well developed as fertilizer can burn tender roots.  See:
 1.
https://www.extension.iastate.edu/news/yard-and-garden-propagating-houseplants

2. 
https://yardandgarden.extension.iastate.edu/how-to/how-propagate-houseplants-stem-tip-cuttings