These are pictures of my very first succulent arrangement that I had put together about five years ago. It should be tested first by using a leaf. Then spray it onto the infected plant. They will survive in harsh conditions and even diseases. It doesn't really matter how long your stem cuttings are. If you have at most 4 leaves, it will be okay. To see the root of a stem cut, simply remove it from its stem and let it dry in a cool place away from direct sun. Try to twist them off as close to the stem as possible.