Deffo NOT spidermites...

you should start in a small pot then when its well rooted go to next size up,
eventually getting to ur 16ltr if that's whast u want to use.
Plant dosent look overfed...
maybe try letting soil dry out a bit before feeding next.
all I can think is starting in your 16ltr pot the roots wudnt have filled it much you may be drowning them a bit.
do you use a wet/dry cycle on the soil?
johneg Reviewed by johneg on . Eutrophication, nutrient deficiency or spider mites? We decided in June that it could be fun to try to grow some weed. So we got on the net and bought a feminized seed. We planted it in it's definitive pot, as advised by the seed seller. We planted it in a 16" pot, filled with a mix of store bought black earth, potting mix and sheep compost. It's been now about 5 to 6 weeks and the plant is almost 2' high. Unfortunately, about a week ago, we started to see some tiny whitish discolored spots on the leaves, especially the ones at the base. Rating: 5