just to clarify, im not recommending anyone grow with time-release nutes soil but Im just saying that it can be done...using quality fertz, soil, and amendments to the soil provides for a uniformly more desirable product in the end and overall more healthy plants..but my miracle grow experiments worked out okay in the end. I mean your just adding another dice roll to the process....
When you grow from seed its a roll of the dice.
When you use water from a tap that you haven't throughly tested or filtered you roll the dice.
When you use soil you roll the dice as to how much nutrient is in the medium - counter this by watching for defencienies and correcting them. This problem is worse with time release nutes cause then you REALLY dont know what is going on.
Keep in mind the plant only takes in what it needs but when its in a POT it cant help but take in whats available to it especially if you give it no choice in the mater, and buildup of salts in the soil makes its environment even worse - BE CONSERVATIVE!
Its the nature of the beast with soil growing you give up a degree of control and roll the dice more then a hydro grower, control is very important when it comes to indoor growing - As a soil grower you must Feed the soil - the soil feeds the plants. A hydro grower thrives on its control but with soil we can let the plants be a little wild and roll the dice a little more because the important thing with soil is to be patient and let the plants themselves be the guide with you as only the aide and not the master conductor that a hydro grower is.