Succulents are the perfect plant for forgetful gardeners. Succulent care is easy, and succulent gardens and terrariums can brighten any indoor space. Succulents survive dry indoor environments thanks to special adaptations – fleshy leaves, thick stems or enlarged roots – that allow the plants to hoard water. Most people are familiar with cacti, which are a type of succulent, but there are a host of other plants grown primarily for eye-catching foliage.