Description

Cast-iron Plant (Aspidistra elatior) is a beautiful perennial and warmer climates for full shade. The leaves are glossy green perched on narrow stems with fat leaf blades. Unfortunately in our zone 6 Kansas climate, they cannot reliably be used as a perennial here. Most broadleaf evergreen plants are difficult to push the envelope with colder zones because evergreen leaves are more expensive to replace than for deciduous plants. (slower and requires more energy from the plant) Evergreen leaves are not intended to have to be replaced every year. In my father's zone 7a Stillwater Oklahoma garden, Cast-iron Plant can reliably be used as a perennial there but are dwarfed to about 1/2 size of normal. Anywhere south of zone 7b, count on it as a bullet-proof evergreen perennial! As a potted patio plant for full shade, they are wonderful. Grown in a raised pot, they are hardy to about 15-20° so you may be able to miss the first few frosts when moving them in for the winter. Before extreme cold (lower than 10 degrees F), they must be moved and overwintered in a dark garage or basement with monthly watering or bright window as a winter-only houseplant. Either way, they will hold up very well in the winter and maintain attractive foliage. When grown as a permanent house plant, they will last many years is grown in a bright indirect area. When Cast-iron Plant is grown as a permanent houseplant, you will need to watch for spider mites and possibly scale after a few years. Taking the whole plant outside and spraying with water a few times a year will help. Spider mites thrive and dry dusty conditions with low humidity (such as your house). Overall, Cast-iron Plants are very easy to grow hence their name. They will tolerate lower light than just about any house plant but after a few years, even this plant will decline unless given a summer growing season under a shaded tree or brighter conditions inside the house. New leaves grow about once per year and gradually the plant will need to be repotted as it is possible for them to split the container. This is a great time to divide the root system and get several new plants. This is one of our all-time favorite house plants.