Yup. 35 is way too low. You have them in a greenhouse and it went to 35?
Weed likes 60 at lights off and 76 at lights on. Those are the ideal temps, yours may vary.
Even so, you should have more growth. They are still green, so they are still growing.
The various pots you have can also be causing issues.
We prefer fabric pots.
Read these;
Basic Watering
Discuss different watering methods for growing your own weed from seeds. Our community members give helpful tips on how pot size and material, as well as environmental factors affect growing cannabis.
www.thcfarmer.com
Watering SOIL
To know if you need to water your cannabis plant get yourself a soil meter. Poke or drill 4 holes in your pot 1/4 way up from the bottom spaced around the pot...
www.thcfarmer.com