Question about outdoor s/h during winter

[Barbie_J]

I live in SW Florida so our winter temps don't get too low but we occasionally drop down into the 30s and 40s overnight. I currently grow some of my Phals in s/h and they love it. I normally leave them outside year round and bring them in if the temps get below 50. It doesn't seem to hurt them and they reliably bloom for me late winter/early spring.

Anyway, I know that the s/h does bring the root temps down which isn't a problem for most of the year and so I'm trying to plan for this winter so I can make sure they continue to thrive. I was considering getting a seedling mat for them to sit on so that the root temps don't drop too low but I'm wondering if that will be enough.

I transplanted the three I have in s/h in December/January this year when they started new root growth and they were outside when I did it and didn't seem to suffer any ill effects. However, our winter is mostly over by then so I'm wondering if that had anything to do with it.

While I'm here I guess I should ask about my Paphs in s/h, too. Should I consider a seedling mat for them, as well?

Thanks, everyone!