Temperature dropping to 6/7c at night, is this a serious problem?

It’s much too cold

Robert is idiot. Fact. No more mercy for people who says shit without knowing !!!! I grew in static caravan for 7 years, 5-7 celcius, not a drop down from day temps, but real such low temperature will cause MILLIONS of problems, give a week like this and you wont sort anything, plants will screw up with metabolism and absorption, maybe will go hermie as last resort ... Put more heaters on, put them on timer to work only during nights.

6c or 7c is cold and you will notice they will start to change colours and growth may change. I would try and keep it above 15-18c. IMO its to cold. and if there is to much moisture your asking for bud rot. Good Luck!

Look at these idiots answering questions. Temps are dropping to 6-7c. That's 42.8F-44.6F. Where the fuck do they come up with 67F.

Sun does down, temps go down as well. Sun comes up, temps go up. Simple as that. 67F is a non issue.

That is not cool enough to cause any issue. They look good.

It's not ideal but they will be fine. You will lose out on yield but gain trichomes. You will also get some nice fall colors.

the noral biological processes that occur at night will not occur, so yes, it is a major problem. At the least it'll slow them down. in future consider the lights on during the night and off during the day. you'll get warmer temps during dark cycle that way.

Run your lights at night and during the day to be off , that's what I do and it helps with temps during the night

67F at night is no problem