I have compiled a list of succulent plants that are easy to care for and almost impossible to kill. If plants are not getting enough light or become too tall, it is impossible to save them. Sedums are easy-going plants that require little maintenance. They thrive outdoors in bright sunlight to full sun. This cactus is drought tolerant and loves full sun. Kalanchoes will thrive in natural sunlight with a high level of brightness. Be aware that some of the poisonous spines in cacti can pose a danger to small children and pets. 1. First, wait until they are large enough to be removed.