Many Different Strains, Same Harvest Time & Growing Condionts?

So with strains such as Jack Herer, OG Kush, Mendo Purple & White Fire OG and a couple other strains growing in the same tent, would there be a big difference in growing conditions and harvesting times?? In Soil under 1k MH&HPS light btw. Would you harvest them individually when cloudy or one big trim? Any advice on this would be appreciated!

Its a good idea to stop looking at harvest/crop as a whole unit, and look at it as made up of multiple individuals. Different strains have sometimes big variations in their flowering times, and thats genetic so external influences will only go so far. I'm running a few different strains right now and already realise that they're going to be ready within the same month, but not the same week.

Thus a rolling harvest is good, harvest as they're ready. Harvesting can be a pain in the ass, but it'll at least mean you take down each plant when its optimal, rather than convienient.