Your outdoor space sounds good. If the sun is too indense, you can reduce it a bit with shade cloth. I would suggest not moving the plants outside right now, in winter. In spring, once nights warm up a little (consistently above 10-12 deg C) so that they can acclimate (and also gently acclimate to brighter light as well). Then they will have have the range of seasons, next winter will be no problem for many of them. (A plant where with a lot of C. dowiana in its background won't like the cold, but L. purpurata will have no problem at all) I grow most of my Catts outside all year - my winter lows are routinely around 4-5 deg C (approximately 38-40 deg F) and occasionally lower for a few hours. C. dowiana and luddemanniana are just about the only common ones that need winter warmth... I don't grow them, I don't have room in the greenhouse for big plants. But that leaves a lot that are fine outside... L (C) purpurata and relatives, C intermedia, C labiata, C. warneri, C. percivaliana.. the list goes on and on. Of course hybrids with any of these species are also fine with the cold.
I grow most of them under 50% or 60% shade cloth - but my yard gets intense summer sun for the whole day, with no trees, so I do need to "take the edge off" a little.
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