How cold is too cold?

I just set up an air cooled lighting system, and now my temps around 65. is this too cold? what are the ideal temps?

Also, what is the best way to switch form vege nutes to flowering nutes? I used 1/4 strength of vedge + 1/4 strength of both parts of the A and B solutions. is that ok?

I would say 75°-80°F is just about prefect. They can tolerate lower, but you might start seeing some purpling and growth won't be as fast. And its more about the roots then the leaves or room temp.

so the roots should be around 75-80?

anybody else??? my temps are around 60 at night and 70 during the day (for the girls that is)

so long as the stocks dont freeze they should live...BUT like vindicated said 75-80 is ideal

cool maybe i'll unhook the air cooled set up, thats about what it was before I had it set up.

what about switching the nutes over? I didn't want to freak them out by changing everything at once. was this a good idea?

id keep the nutes how ud been doin it....after a week or so, or once u see sign of flower then go ahead and go full out bloom

Thanks everyone!!

for the record, photosynthesis is at max level at 85 degrees with ambient CO2 levels. if you increase the CO2 you increase the ideal temperature for best rate of photosynthesis which equals more growth. just sayin...