Mix FFOF with JUST NATURAL ORGANIC GARDEN SOIL

[Poppylon]

I want to mix FFOF with JUST NATURAL ORGANIC . I am wanting to tone down FFOF and cut back on cost. A free used FFOF buy is self and he had burn problem .
Here is the nutrients in JUST NATURAL ORGANIC.
JUST NATURAL ORGANIC has worm casting . thanks

.004% AMMONICAL NITROGEN
.004% WATER SOLUBLE NITROGEN
.032% WATER INSOLUBLE NITROGEN
AVAILABLE PHOSPHATE (P,O) .O6%
SOLUBLE POTASH (K,O) .04%