Confused about the temps and the growing stages
I have 4 hibiscus that I purchased at Lowe's (kind of the end of the season sale, but it was several months ago and these plants were thriving at that time). I have them all in 5 gallon buckets inside an outdoor planter with the intent to bring them into the GH when it got cold. So far I've been able to cover them when the temps dropped in the mid 30's. These temps are only lasting a few hours. then the sun comes out.
I asked this on another thread, but the tags on the plants said different things, one said cold hardy to 10 to 20 degrees, the other said 30-40 F. So what's the norm for them?
These plants are full of new growth and are flowering (sporadically) but there seems to be at least one or two flowers on the plants and buds too at any given time.
Will they go dormant? should they be in the GH now? Can they make it with a short bursts of cold? I could continue to cover them and as it gets colder, I could make their coverings more dense (bedspread vs sheet).
I'm not at all familiar with what to expect so any tips would be appreciated.