Hi I just bought a "selection" of plants from a plant rescue site and I have 6 heucheras (3 Palace Purple and 3 Coral Forest) that I don't know what to do with. I've never grown them before. Need some tips please! I have a shady area I can plant them in next to my house. I also have a full-sun border I can pop them into. I am guessing they don't get very tall? Tell me about Heucheras!