can I grow a photoperiod alongside autoflowers??

yes you can. make sure you start the autos first on 18-6 for a veg for a few weeks, then put your photoperiod strains in for veg under same light. if your photoperiod plant are in flower and you decide to start a auto your yield from the auto will not be as much as if it had loner light hours. heres a chart a bit on autos and what to expect: 3-5 weeks are the vegative stage 4-6 weeks is the stretch phase 6-10 weeks is typically the flower stage autos are bred to do their job and make us buds, hope this helped

yep I'm doing this now running 3 20gal pots 1 auto, 2 for a nice veg. Check out my journals if you want to see it. Good luck!

Ok bloom light spectrums will make plants in veg stretch. Second you will need to keep in in full spectrum. Last you will have to watch the humidity for the buds and the size of the vegging plant, Yeah do it all the time

Sure.. a photo will continue to grow -- pot and nutrients willing -- as long as you don't give it uninterrupted light for at least 10-12 hours. Your autos could be fine under 12 hours, if you can increase intensity of light to provide same # of photons as you did over 18 hours (or however you are setup currently in a proportional way) The only requirement here is that you provide uninterrupted darkness when you want the photoperiods to start flowering -- 100% your choice when this occurs... other than that you can do it. Even reducing # of hours on autoflower is mostly unimpactful as long as you provide more light over fewer hours to make up for the loss... and that extra light itself causes no problems of course.