I think they can be difficult to grow here in Oklahoma, more due to the heat. Hybrids of Heuchera villosa, H. americana, and H. pubescens, are more heat and humidity tolerant than some others. There are other hybrids of Heuchera such as H. sanguinea, H. pillosisima, H. alba, H. bracteata, H. cylindrica, and many others. These have been used to create hybrids with various traits such as foliage ruffling, flower size and color, foliage size and coloration, heat tolerance, etc. Some "innocent" retailers do sell varieties that are not as tolerant to heat and humidity, to the unsuspecting consumer, so it is wise to know those that are more tolerant of our environment. I grow a species Heuchera, which I believe is villosa, that I grew from seed, and it has fought off the heat and drought like a champ. Heucherellas are also less heat tolerant and are best grown in the Northern states or Northeast Oklahoma at least. Heuchera 'Purple Palace' is a hybrid grown from seed of H. villosa var. macrorrhiza, a native Heuchera found in the Southeast USA. One of the largest breeders in the US is Terra Nova Nursery, which also does a lot of breeding of the newer cultivars of coneflower. Heuchera was then crossed with Tiarella to create the newer xHeucherellas. One of the biggest issues with Heuchera culture is that they are very susceptible to frost heaving. Frost heaving is caused by alternating freeze/thaw cycles that occur in winter. To protect them against heaving, mulch them very well in winter, make sure they are planted in a well-draining soil since heaving occurs more in clay and water retentive soils. Otherwise, they should do fine. Heucheras are also short-lived perennials unless they are divided every 3 or 4 years when the crown becomes woody. I am attaching an article on protecting your plants from frost heave that goes into much more detail about the causes and controls, if you are interested. Susan Here is a link that might be useful: Preventing Frost Heave in Your Garden

I had one in the kitchen. It lasted a little over a year. It looked nice but started leaking, had a really weak flow, and the retractable head stopped retracting because the hose got frayed and would get stuck. We replaced it.

It's a beauty. I'm so glad I purchased it. This replaces Spartacus which I tried 3 years to grow without success. How old is your plant?

Thank you for taking the time and thought to list them Kristine, I knew it would be hard. Your list will likely grow after you try out your new additions. I'm digging like a gopher to extend my East flower bed a few more yards . I've held out a long time not buying Munstead Wood. There was only one left at a nearby nursery ; when I changed my mind and turned back to get it, a young couple carried it to the checkout. Bolero was only 17 dollars at Walmart last Summer , I think I must have been paying off a big Vet bill at the time . It seems like when I deny myself new roses too long, the dam finally bursts and I go hog wild buying a few regrets. Last year I went vegetable seed crazy which turned out far more expensive than any of my rose purchases , substitutions don't work.