If you are growing in a quality soil then it will usually have enough nutrients to support the plant for about 3 weeks. If you are in soilless or hydro then I start feeding on day 3. In soil it is best to monitor your plants leaves for signs of lightening in the shade of green or unusual spots of changing color. This is a sign that it is time for a feed. Good luck with your grow!
Hi @Lucifer666 automatic plants should not be transplanted but since your plant is full of strength and vigor you should transplant as soon as possible. if you don't want it too big, transplant it into a 5L / 5.5L pot. good luck mate ๐