Hi @ntanhmmo! If you want to be safe, start nutrients when the plant shows pre-signs of a deficiency, otherwise you'll risk overfeeding and you'll potentially hurt the plant. If you know what you're doing, you can start now with a roots-stimulator, then vegetative fertilizers with Nitrogen by the week 3 (approximately). Try to follow a manufacturer's schedule, but divide their doses by 4 at the beginning. So start with 1/4 of the suggested doses, then slowly increase nutrients intakes if the plant responds well and looks healthy. Hope this will help, keep us up-to-date and happy growing 👊
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