Ok, I'm not Rusty, but here's my take, Make sure your PH is right,...(How are you testing? before you go and adjust anything) the tips could be burning because the MG nutes might be too strong?

FoxFarm Ocean Forest is the soil I use, All of my strains seem to LOVE it! Right out of the bag it works well for me. I've tried MG, and prefer FFOF hands down.

For Up Potting,... None of those plants look big enough to be root bound at all, which will result in a stressful up pot,... It could be done, but I wouldn't if you're planning on kicking the lights in the next week to month. If your planning on waiting about a month, then probably up pot around week 2 of flower. (I try and up pot when I'm watering every other day, she's nicely bound but not too tight, then just as the soil is about 50% wet from watering so, 1/2day to day after watering I'll tip her up, slap her bottom and slide her out! I always up pot before "Night" cycle of the lights to reduce the stresses put on the roots. )

Pic 1: Durban Poison at up potting time 1.5 months vege in a 1 gallon square container. You can see the texture of the bottom of the pot.
Pic 2: Same plant, this shot I'm actually supporting it by just holding the stem! I don't recommend doing this, but it is a good demonstration of how the root mass will hold the soil together when transplanting is done correctly.
canniwhatsis Reviewed by canniwhatsis on . yo rusty help me out i still have that shitty mg soil because i have been broke but i just came up on some money so i was thinking about getting some new soil. i also plan on flowering soon so i have a few questions. if i am going to transplant should i wait till the day i flower? i heard fox farm soil is great for cannabis, is this true? if so, does it have good drainage? or do i have to buy more perlite? i am still having problems with the tips of leaves turning yellow and eventually brown. is this because Rating: 5