Ive got a bag of promix hp

So i e got a bag of pro mix hp and was wondering what shold i use for amendments if any. I will be using a liquid fertilizer throughout grow also

No need to ammend if you’re going to hand feed. Just beware this isn’t your typical organic potting soil and will require feeding relatively quickly.

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I was thinking of adding some gaia green 4-4-4 to my promix. Will doing my feets after hurt my plants.