Every stage has its own handful of jobs. This series works through them in order — what to do, what it turns on, and what you should be writing down. The numbers behind it come from the calculators.
The series grows chapter by chapter. Read the start now and you have the rest when you need it.
Every chapter covers one stage and answers the same question: what needs doing now? The jobs, the order, the usual mistakes. No chapter spreads target values out — those come with a calculator on the calculator pages, and every chapter links the ones that belong to it.
That separation is deliberate. If you want to know how something is done, you read here. If you need a number, you put it into the calculator — where it sits with its reasoning and is maintained in one place instead of seven.
Three things decide more than any equipment: light that arrives, air that moves, and the patience to leave a plant alone now and then. Everything else can be added along the way.
What should run from the beginning is the record. Not because bookkeeping is fun, but because every grow happens once: what you do not write down on the first, you cannot improve on the second. A start date and a few lines a week are plenty.