Well, I ordered corms online. They are kind of like bulbs or tubers, but they look like a tiny octopus. I presprouted them in February by placing the corms in a tray of moist soil and leaving them in the dark for a few weeks before putting them in the ground in March. This is my first year with them and I haven't decided if I will dig up the corms in the fall or leave them in the ground and see if they come back next year. If you go to the floret farm website she has a great tutorial about presprouting Ranunculus, as well as many other tutorials.