As long as the freeze doesn't drop abruptly to the low 20s or teens
after a few weeks in the 80s, many TBs aren't bothered. A slight freeze
or frost usually only damages open blooms. And it also depends on your
garden location (i.e., how long it stays that cold - an hour vs 6 hrs
makes a big difference ). So don't despair (till later...)
We occasionally have light frost this late, rarely.
Linda Mann east Tennessee USA zone 7/8
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