I think this might be in thr wrong section, but anyways, if you're asking if it's too early the answer is yes. Your plant won't need food for *at least* a week or so from that point. And that depends on what kind of medium you transplanted into, if you planted in ocean forest or something similar you probably won't need to do anything but water for the first 3-4 weeks.
Also if grow big is the only veg nutrient you bought you're likely going to have many deficiencies start popping up. Grow big is part of a 3 part nutrient regimen, you will need big bloom as your micro, and tigers bloom as your bloom nutrient. 3 part nutrients are usually broken down into a grow part which is your nitrogen heavy vegetative nutrient, a micro which contains most of your micronutrients such as zinc, copper, magnesium,iron etc, and a bloom nutrient which is usually heavy on P, K, and calcium to stimulate node and flower growth. There are always a bunch of additives for most lines but i would keep it simple for your first harvest, dealing with 18 bottles of crap and powders is way less important than controlling your environment and reading what your plants need instead of kindly forcefeeding them.
Good luck!