If they are the type of perennial that can go dormant and grow back from the ground, but just not in a place as cold as where you are, like wax Begonias, I would be fairly confident about trying to store them in dormancy. If they are like Coleus that just can't take frost at all, this would not work. A few sources I checked said a few light frosts is about as much as Pentas can take, it doesn't go dormant. Maybe using a hanging basket could be a way to keep this plant in some light without using "down" space.

Hi Maureen, I purchased seed but haven't yet planted them for growing this spring. It will be my first try with seed. The seed must be tiny as they are pelleted and are packaged in a little vial. I also purchased six large Penta's at the Fall close out nursery sale and repotted them for overwintering in the cool greenhouse. They are still alive and putting out new growth at the base so I think I'll get a good summer's blooms from them. The reason I'm telling you this is because I also pinched off end shoots and rooted them in damp potting mix. I have one cutting that is currently blooming and the other's are green and I presume, rooted. I must have taken the cuttings about first of November. I think, if it were spring, the cuttings would have rooted more quickly. Anyway, if you happen to purchase a plant or two of Penta's, do try to take a few cuttings from them. It's a cheap way to expand the number of plants. I believe they are hardy annuals so you should get blooms this year from plants started from seed. They are wonderful nectar plants for hummingbirds and butterfilies. I have limited sunny garden spots so want to make the best use of nectar producing plants. At the nursery, hummingbirds came right down in front of me to feed from the red pentas. After getting the plants home, the butterflies loved them, too. Good luck and happy gardening. Mary

They are semi-tropical, hardy to zone 9, so my guess would be no, but hey, you never know until you try. Do you have an area that stays in that 40 to 50 degree range, maybe a root cellar or cool dark closet?

Depending on where you live they can freeze back in the winter. I would wait until spring when you start to see new growth and know they are in a growing phase before transplanting them.