brown marks on leaves [with photos]

these brown marks started appearing shortly after i had to bring my plants inside because it was raining outside for a few days

then, because it was getting colder out, i started to put my plants in a greenhouse

is it because i am not getting enough airflow?
im worried because i see it near some of the buds on my bigger plant
thanks

halp

Tell us medium used and feeding so far. They’re obviously deficient.

just miraclegrow potting soil, but theyre very old plants
i had to force flower them with trash bags

no nutrients/fertilizers fed only water

only using Nuke Em spray for mildew

Looks like calcium deficiency

ill post more photos when i have a chance. where it forms, the leaf feels very wet. but then when i put it under a fan instead of the leaf dying it dries out

i have a feeling it could be because i moved them into a greenhouse (its 50 degrees out here)

that it might be the humidity, as i did not have the doors to the greenhouse open.

should i get some bloom nutrients like tigerbloom ? (i need to show you guys my bigger plant)