Tropical hibiscus: how cold is too cold?

linnea56(z5 IL)October 7, 2008

I have a growing number of tropical hibiscus plants that I will be bringing inside for the winter. How cold tolerant are they? I will watch for frost warnings, of course, but is there a temperature in the low 40Âs (or wherever) to which they should not be exposed? A cut-off point? They are blooming a lot and I hate to suddenly reduce the light they are getting while blooming.


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beachbarbie(z9a/8b NC)

It depends on how you're going to overwinter them. If you want them to continue blooming, then around 40 will be the cutoff.
I don't care if mine go dormant, so I wait until it gets around freezing.

    Bookmark   October 8, 2008 at 8:27PM
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