A Question for Gardeners: Can You Identify this Easy to Grow Purple Flowering Perennial Plant?

Sedum Autumn Joy in Back, Volunteer Spiderwort to the Right, Mystery Perennial up Front

In my last post, It's the End of Bloomin' May Already, I mentioned a several-year-old mystery potted perennial in my garden that is not only pretty, but requires no maintenance and will also put up with anything—so who cares if I don't know what it is.

Katherine at Windchimes (who makes elegant fashion jewelry from glass and metal beads—look at these cute little dragonflies!) was curious about it and asked if I would post a picture, which is exactly what I'd been thinking of doing. I realized it might actually be nice to know what this plant is, because then you'd be able to seek out one or two for your own garden. (I wouldn't mind adding a few more, too.) I also figured at least one of you out there would be able to identify it for us.

I have no idea where or when I got this plant, but it was at least a few years ago. It's growing in a round ceramic pot that's about 12 inches across and maybe 10 inches high, and right now is sitting against the front of the greenhouse where it receives several hours of sun a day. I think during previous years I've had it out in full sun. During the winter it lives in the unheated (except for a couple of nights a year) greenhouse with my other potted perennials. When temps dip down into the single digits, I cover it with floating row cover and/or an old bedsheet.



The plant itself is about 14 inches tall right now and is covered with these delicate pale purple blooms which last for quite a while, though I've never paid attention to exactly how long. The leaves always make me think of catnip, which is in the mint family, and—I just went out and checked—they do smell faintly minty.

I have a feeling the plant might get a whole lot bigger if I put it in the ground, as this has been my experience with other potted perennials, despite the fact that I periodically put a layer of compost on top of the soil and fertilize with sheep manure (simple instructions on how to make your own manure tea coming soon!). The only exceptions to this have been my big pots of lemon balm and Sedum Autumn Joy (seen behind the mystery plant), but that's because I've kept them in the same place for so long they simply sent roots out the drain holes of their pots into the soil below, and so technically are growing in the ground.



So do you know what my mystery plant is? Do tell! And if you'd like to solve other garden mysteries—or have one of your own you need help with—check out Fine Gardening's Mystery Plant gallery, a fun and informative place where you can post a photo and have your questions answered.

© Copyright 2009 FarmgirlFare.com, the mysterious foodie farm blog where solving plant puzzles is a lot more interesting than weeding, though it doesn't help feed the compost pile like weeding does—unless of course everything you identify turns out to be a noxious weed, which is what happened the other day when I did a little mystery plant identification in a beginning gardening friend's flower bed.