m0useanswered grow question 2 years ago Don't forget that Autos will not tolerate high EC feeds like photoperiod plants will. They can go into shock and enter flower earlier then expected. Less is more with them. up to 1/3 to 1/2 the strength.
I have used feed water feed before on peat medium grows, its not the same as coir but it is very close. it still worked out for me. When giving only water, water for what is needed, no runoff. Then get 20% runoff when they are getting their feed. Not everyone has the option to be wasting nutrients and I like to try and spread it out a bit. Ideally the best option is to feed always and get 10-20% runoff each time but its not always possible. when we say % on runoff its percentage of the pots volume. eg 1000ml pot [10% = 100ml] [20% = 200ml] and this is only if your feed is correct. Might require a bit more runoff to fix a overfeed.
Good Luck!