PenguHBanswered grow question 3 years ago It depends on a lot of factors - the soil you use is the main one. If you used nutrient rich compost from a regular gardening store, your plant may not need nutrients until late flowering!
The way I do it is leave the plant be for the first week - the energy in seeds will suffice for about a week of development, even if not much nutrients are available. After that, I feed at 50% strength until I notice underfeeding signs (whole leaves getting pale and yellow). Then I switch to full nutrient dose. This way you can be sure your plant gets exactly what it needs while still getting the good stuff from soil and promoting root development to get those missing nutrients. You can also not feed it at all until you notice hunger signs, it is up to you. Whichever way you go, make sure your water is always within the right pH range. Good luck!