Hi, you need to place the corms hollow side up in a shallow tray of moist compost so the tops are not under the soil. Then put them in a frost free light to grow. The corms dont like to get wet so always water the soil around them, if you get water in the little hollow the corms can rot. Once they are about an inch high then you can move them to the container your are going to display the begonia in. Wait until all possibility of frost has gone before you put them outside. Hope that helps!