Those cups are good size. Just wrap the cups in tinfoil something so the roots aren't exposed to light. I figured that the soil would be a garden/tomato type of soil. You will want to get some kind of nutrients to feed with some time soon. Or a soil that is better amended for growing cannabis.Smaller than that ? (picture)
Its substratum not made for cannabis its for the garden (like tomato salad..)
and the more i read along, the less inclined i'm getting to do so
ok ok, JK!
but seriously, the more i read & think about it, the more i'm startin to think "scrap this & start over clean"
in the proverbial nutshell, gettin weed to grow with any margin of success duz involve -> preparation
it may also be well possible that the solo cupz are culprit, meaning they've become rootbound & that'z why they're not growin anymore...and yes, the tempz aren't high enuff, as otherz have already said
ppp