You can always cut the bottom off the pots, and plant those in the ground, then you can keep the pot out of the sun, and save 6" to a foot of soil by leaving the top of the hole empty for the pot? In-ground would likely do the better yields, but pots can work, too. I've read a lot about growing outside out of general interest, but have not done it personally.
If you're working with a greenhouse, I'll bet you've got some idea how to grow plants, so when in doubt, stick with that. Make sure they get at least 6 hours of direct (thru a light shade, shade-cloth, or similar light-foliage, is fine, but not too dense) sun each day. Make sure they get food, but not too much; less is more, go straight-organic for taste. Make sure they get plenty of water, then get time to get pretty dry between waterings. A lot more problems are caused by overwatering, but you will learn the watering schedule the plants want, by watching their posture, no kidding. They should reach out and up when they are watered and drinking, and happy. The leaves will slowly relax to just reach straight out, then straight out and slightly-down, then continue relaxing and lowering down as the plant dries out.
The idea is to interpret your plant's water needs by: plant posture, watering schedule, and of course, feeling or poking a moisture meter into the soil/ground to feel if it's very wet or very dry or somewhere in-between. Also lifting the pot is a helpful test; it's much lighter when dry, try doing a hand-lift test before/after each watering and that can really give you a good idea what's doing under the hood. In-ground, I guess it's just posture and schedule. Water needs typically increase during the lifespan of a plant, up to the middle/late-mid flower when water amounts should be lessened 1/3 or so for need and mold-prevention. Speaking soil here, not hydro, but I'm sure applies in soilless mix too.
I'm interested in your setup now. Throw some more description or pics up if you would like, and i'll look closer. Anyway, I'm not sure of of the above you asked for but you got it anyway.
Looked at original post...how to boost yields? Give plant an easy and healthy life BY: fertile growing-space with consistent, proper-range/non-extreme humid/temp, plenty of water, fresh air, and light, and space to grow. Those 5-gal pots will be a problem on the last count... I think ya gotta get em into bigger pots, or the ground.