PenguHBanswered grow question 3 years ago Your plant will show you - leaves will start showing deficiencies if the soil is depleted but do not worry - you can start providing nutrients even if it is not completely used up the stuff in the soil. If you go over the top you will get burnt tips - a clear signal to stop feeding. You will know when you see it.
I did my grow in compost with 2 months worth of nutrients and I started adding nutes after 2 weeks in small doses, worked out perfectly fine. Good luck!