I use Blattwerk Pure as a general feed, once my compost is depleted. I will add a little Epsom Salts to that once a week. During flowering I use Plant Magic Old Timers and a touch of Epsom salts. I can get 500g out of 1m2. Back in the day, 20+ years ago, I used to use Tomato feed at 50% strength for veg and full strength for flowering, TBH that worked too. I use premium brand stuff these days because I find it to be better value. 1L of Blattwerk Pure lasts a couple of years, a bottle of tomato feed is the same price but lasts half as long. I am spending about £20 a year in nutes.
My mate uses Advanced Nutrients he has about a dozen bottles and spends hundreds a year. He thinks the fact I use "bath salts" that costs £1 for 1KG to be crazy as it will taint my weed. Fucking bro scientists.
If I were to follow the Plant Magic Old Timers schedule I would require 8 different products. Oh and Plant Magic Organic Magnesium is a fucking rip off, do people really pay that much for a little tub of Epsom Salts?
Peat based soil mixes are soon to be banned in the UK. I am seriously considering making my own compost and augmenting it with a mild mix of chicken manure, fish, blood and bone with Epsom salts and going completely organic.