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You really only wanna put top soli down if from watering it's starting to get low or if it if you plants looking a lil unhealthy even if you are feeding the right nutrients but if u wanted you could put some on once a week and you'll be fine
I disagree as you are growing an auto flower.
Top max is very heavy in Nitrogen, so if you are using biogrow too, I would not exceed 0.5ml per litre at 6 weeks with 30cms plants. Even then it may be too much