Heuchera can be propagated by several different methods and most are very successful
1. Division: This is by far the easiest and most successful way to replicate your heuchera. Dig them up in the spring when they are actively growing and break them into smaller clumps. You should be able to divide them by hand but if the clump is too big you can use a sharp knife. Dividing them in the late summer or fall will not work as well because coral bells can heave or rise out of the ground during the winter if the plant is not well rooted in. Diving them late doesn’t give the plants enough time to develop strong roots. Don’t make the divisions too small. You want to give it a good root system to start. Don’t be greedy
2. Cuttings/Leaf division Cut a 3 to 4 each stem. Cut the attached leaves in half or tear off leaf on the bottom part of the stem. Apply rooting hormone to the bottom cut of the stem. Also apply a cut or slice on the veins of the leaf where it connects to the stem. Place the stem in a peat moss based media and frequently mist. Cover those cuts with peat. It’s important to keep the soil warm and the cuttings cool. A fine mist a few times a day will work but a timed more frequent mist is ideal. You will eventually get little “bulbettes” on the leaves that can be divided as new plants. We can 8 or 10 plants from one leaf with a little luck and good propagation location.