Yeah. I feed a lot more than most ppl.
Lotta guys on here will tell ya ull kill ur plants by giving em as much nutes as i do. All i can say to that is proof is in the puddin.
I start out outta the cloner at 600ppm. By the time i flush em for harvest im upwards of 1500ppm and sometimes up to 2000. Fwiw i use a ton of compost tea.
No just because u take a lil longer fer ur pots to dry dont necessarily mean ur soil mix is off. It cud mean any number of things. Cud mean u up potted too soon. Cud mean ur environment isnt dialed in. It might be as simple as ur plants haven't quite grown into the pots yet and they just need a lil more veg. Really hard to say w/o more info. Watering every other day is not bad at all imo but every 4 days isn't what i wud be aiming for personally.
I wudnt mix mediums myself. Say for instance i transplanted from clone to
promix int a 5" pot i wudnt go into coco next time i up potted.
The reason its not recommended is cuz ever medium has different water and o2 retention properties and what happens is the roots may not travel freely to the new medium once u up pot.