Needing some help with my plants

[Ruefuu]

He is right it's winter my rh is 16, im watering every other day but just to keep them wet but not soaked, plants are doing fine with no problems but i cant turn heat off sucks you cant drown them but you do have to go easy, last winter i ran a humidifier but i got spoting, but my 2 grows are fine.

Spotting?