adding scotts continuous feed to my plants

well i have about 2 or 3 cups of scotts contiuous grow up to 4 months. my grow is outside. i want to add like 3 shovelfuls of native dirt to the small amount of soil. the npk is really low. like .07-.03-.01 and it will be like 25/75 soil/native. would this be good enough to add an inch or two to my buckets and not burn anything? not only that its continuous for 4 months. which would be around harvest. but considering the npk is so low and the soil would be diluted do i have anything to worry about?

hmm im not really sure on this one.. i probably wouldn't add 2-3 inches.. probably just a handful or two

yeah i added about 75 native 25 soil and added about 4 handfulls each just to help with my two smaller ones i think im ripping one up as it seems to be a male

ah ok... good luck!