Hi, Group.
From a plant science perspective, the photoperiod vs. autoflower grow decision is based on numerous criteria, many environmental, some personal preference.
Allow this old baby boomer, master gardener, to toss out his two cents worth. Note: both grows strictly adhere to Arizona recreational cannabis cultivation statutes!
- I do not grow indoors. I grow in: 1) an outdoors summer garden, in a well amended, pH corrected, vegetable garden plot, and 2) a winter grow in a 10' x 20' x 6.5' polytunnel greenhouse using 50/50 coco/perlite in fabric pots.
- Summer. I live in the Arizona Sonoran desert where high summer heat (20 - 30 days over 110°F) and low humidity (<10% common) present growing challenges that can be overcome. I grow both heavy sativa photos, for their genetic ability to handle heat stress and grow big for big yields, 7 to 8 months seed to harvest, and hybrid autos for a quick harvest. The autos I have tried can generally take the heat. Only downside is the heat can volitalize off the terpenes and occasionally force some foxtails. Once planted, and doing some topping (photos) I simply water, fertilize and wait for harvest time. Real low maintenance!
- Winter. It very rarely freezes here in the winter. I maintain greenhouse temps between 65°F - 85°F with a couple of box store electric space heaters. The key here is growing autoflowers exclusively. With less than 12 hours of winter daylight, small photo seedlings would flower immediately without much vegetative growth. Not an issue with the autos. I like the XXL auto varieties because of size and yield. The lower levels of natural light add 3 to 4 weeks to seed vendors finishing times, but the buds are dense and fragrant. This setup requires much more maintenance, like daily watering, mixing nutes and monitoring greenhouse temps.
My choice of photos vs. autos really depends on the conditions I will encounter during the grow cycle. Indoor growers will have different conditions to consider. Rambled a bit. Regards.