I think they engineer that stuff to go to the whole season. Maybe time release fertilizer which makes it tough to get around. Just my opinion but if you’re going to use miracle grow, I think you’re better off starting with a low fertilizer soil and using miracle grow fertilizer to feed them. Back in the 70s that was ago to fertilizer when things were ramping up in Norcal. Up in Humboldt and Trinity you could always tell a pot grower because their hands were stained green or blue. Lol.