Can new growths on Brazillian laelias take low temps?

[Jeff214]

I've been told that Brazillian laelias can take down to near freezing temps. I wonder if that still applies to newer growths? Most of my laelias (crispa, purpurata, lobata, tenebrosa and various hybrids) have recently started new growths. They seemed fine for a night down to 45 oF, even a hybrid with C. triumphans (which I think is a warm grower?).