Succulent terrariums are popular because they give you numerous planting options. The variegated or crested varieties can be propagated using cuttings. However, the roots of the crested and variegated succulents are more difficult to grow and are often grafted. Take out the dead and rotten roots, and then plant the succulent in a sunny area. Dry it thoroughly. It is sometimes impossible to plant succulents in a suitable container because of all the cute potential planters. What Kinds of Succulents Keep Small? It has small prickles along its stems that make it look like a cactus.