nutes for soil

Hey everyone new to site and growing. I’m a first time grower in Michigan and as started off given a bottle of skunkwerks all in one nutes. I finished my first gallon and reordered another at $150 a gallon. I was wondering if anyone ever used skunkwerks and if so what was your experience with...

Just in general, if you cut out all nutes too soon or badly under-nute, like maybe in week six of an eight week strain, instead of giving nutes all the way through till week seven or even eight? Would you see the fan leaves get cripsy and curl up? Is it better to let the plant cannabilize itself...