Gardening grandma, yes buy best varieties you can...for me that means online. Generally, in garden centres the best ones go fast. Only thing though.....if you don't mind me preaching .....it's worthwhile giving hellebores the right situation and making sure the soil site has plenty of humus, nutrients and space. For my latest hellebore I knew exactly where it was going and, even though,the soil there is very good, I still added compost and fish blood n bone and then mulched with dried manure. It means next spring it will be as good as it can be.