Advice for using this

Trying to reuse soil from a couple containers last year for pepper sprouts . I have this fertilizer left over from last year and it doesn’t have any instructions for seedlings or potted plants . I have peppers sprouting in starter peat pucks, plan on putting them in solo cups under a grow light until I can plant in the ground . Anyone ever used this for seedlings? How much would you recommend per gallon of soil ? Was thinking 1 tbsp per gallon of soil (that’s what I do for cannabis with Dr earth nutes, but obviously that’s not a good comparison ) don’t want to fry the seedlings .