Watering/Nutrients

high, it all depends on what kind of soil you are using. When you are using a light-mix soil then start to feed after 2 weeks. When you are using a regular soil around 4 weeks. I will give you an indication about how much you need to feed. You can start with pH 6.5 water first 2-4 weeks. After those weeks you can start with EC 0.8 with basic grow nutrients that contain a lot of N. Now you can up the EC with 0.1 every week. You keep giving grow nutrients till pre flower (around 2 weeks after flipping to 12/12 light schedule). From when you see the first white pistils you stop giving the grow nutrients and you start to feed bloom nutrients. When you've reached EC 1.6 you keep giving this EC till flushing 2 weeks before harvest. When you are adding boosters like PK boosters during flowering you just add less basic bloom nutrients. You do not want to give too much and stronger then EC 1.6 this will cause nutrient lockouts and nutrient burns. Enjoy your grow!

What Chow_13 said....

I will usually start around week 2 and only give 1/4 dose. It depends on the nutrients your using and what you plan on growing in( soil, coco ). Some nutrients need to break down a bit before they are available to the plant. If its synthetic bottled nutrients then be cautious on how much you add, To much food is usually harder to fix then not enough food. Happy Growing