Leaves turning under and brown 25 day old plant

At 17 days old I gave this plant 1/2 cup of the Growth Booster nutrient and now have LOWER leaves turning under at the edges and turning brown (see pics). Is this a case of nutrient burn and did I give the dose too early? Will it get over this or is this possibly something else entirely.

I am a first time grower and would appreciate any and all suggestions.

A bit early but at that stage of growth feed at reduced rate’s at first by 1/4 amounts and then work up - just flush?feed with water for 4-5 days then start to feed 2 out of every 3 days

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Thank you for the advice. Do you mean that after 5 days of nothing but water I then should start feeding 1/4 cup every other day?

Can you post a pic I can better help you with a pic. Thank you


Flush (water) for 5 fays and then start using your nutrients again; feeding them 2 out of 3 days (feed cycle)(3rd day water)

Than you for your help.