So your trichromes at least have the swollen mushroom tops happening, thats a good thing, they're at least developing. Cold temps can help increase trichromes and colors on the plant, but you will still need a relatively warm daytime environment. Try making just a couple adjustments, if you have to water with warm water at least the roots will experience some trick of warmth, if you cant heat up the whole area. Aim for 70s daytime at least.
Good luck with the finish, nice trichrome photo too, really great quality. ✌️