Blue Dream'Matic first timer

Week 2 of our plant project went mighty well! The ladies all started growing wide, although at slightly different rates. I'm thinking overwatering one of them may have hampered the growth and taken out a bit of the soil nutrients. The rest are doing very well! I still haven't been able to achieve a stable temperature, and since my temperature and humidity controllers are currently stuck in transit somewhere, I fear this may continue for a while. Temperatures vary between 15c and 30c, which I've understood is quite a gap. The outside weather does have quite a bit to do with my ability to control the growth environment, unfortunately. I've got the exhaust fan on low, and the bottom fan on medium to circulate air. I've noticed faint smells whenever popping into the grow room, and I can only imagine it intensifying over the next few weeks. I am constantly fighting the urge to overwater, it seems like an age passes before the top inch of soil is relatively dry. I gave a total of 18L of water this week, for 3 plants in 7L pots. That seems low, but I'm trying to listen to the plants here. My next grow I will definitely look into getting auto-watering pots or something similar. Oh, and we've been saying goodmorning and goodnight, including some sweet talking! I'm a changed person! lol My advice? Make sure you have controllers for humidity and temperature before starting, combined with either humidifier/dehumidifier and fans/heaters. A small electrical rib-radiator with oil is more than sufficient, even for cold climates. In an emergency, boiling the kettle in the room raises humidity, and so does hanging wet towels in there. I've been struggling to keep the humidity above 30% at times. Curse this climate. Oh, and I read somewhere that topping the pots with perlite can help keep moisture in the pots, if that's an issue! It's not here. But still! Happy growing, everyone! And thank you for being a helpful influence in these times of struggle. <3