This is the fastest way of killing any succulent. Depending on the age of the cactus, corking may progress quite a way up from the base. One sure way to reduces the chances of pests invading cacti is by growing them healthily. It is not a good idea to transplant during the growing season. This recommendation is based on what works best for succulents and cacti. Transplanting your plant during the growing season can cause stress to it. When your plant suffers water damage, root rot, or other stressors, you may see signs like swelling.