Korean Rock Fern

Korean Rock Fern is not often thought of as an indoor plant. It can be grown outdoors successfully in zones 7-10. The colder hardiness zones can grow this fern, also known as Polystichum tsus-simense, as a houseplant that spends its summer outdoors. The delicate dark-green fronds mix well with other ferns or nicely contrast a shady mixed seasonal planting. Korean Rock Fern is native to East Asia and has been naturalized in Florida and Louisiana. Best Locations For Growing Korean Rock FernFerns of all sorts enjoy high humidity and lower light levels. Rooms like the kitchen and bathroom are ideal for displaying this plant. Because Rock Fern is not considered toxic, it can be used in bedrooms and family rooms where pets and children spend time. Ferns are natural air filters and are good at filtering chemical gasses from indoor furnishings.Korean Rock Fern Sunlight RequirementsFiltered light and low light levels are perfect for Korean Rock Fern. The dark green fronds will not tolerate exposure to direct sunlight. Place the plant in a north-facing window or east- or west-facing room away from the window.Korean Rock Fern CareFerns like potting soil that is both rich and well draining. Indoor potting soil mixed in a 3:1 ratio with worm castings works well. Repot this fern in the spring when the roots grow from the bottom drainage holes. Take time to acclimate Korean Rock Fern when moving it outdoors for the summer. Gradually move it from deep shade to dappled shade. Always bring the plant indoors before the nighttime temperatures fall to 40 degrees F.Watering Korean Rock FernWater this plant when the top 2-3 inches of soil feel dry. Thoroughly soak the soil and let the excess liquid drain out. Saucers should be emptied so that the roots do not sit in water. To keep the humidity high around ferns, mist the fronds daily with distilled water.Feeding Korean Rock FernSlow-release granular fertilizer is an easy way to provide nutrition year-round to ferns. Mix the fertilizer into the soil at planting time or add it as a top dressing in the spring. Look for a balanced ratio of NPK at 10-10-10.Korean Rock Fern InformationLight Exposure: Bright Indirect Light, Medium LightCare Requirements: EasyWatering Requirements: Average – Keep lightly moist. When the top 2 inches of the soil dries out.Pet Friendly: NoKid Friendly: NoAir Purifier: ModerateHabit: MoundedGrowth Rate: FastMature Height: 12-24 inchesMature Spread: 12-24 inchesFlowering: NoFlower Color(s): NoneFlower Shade/Description: Grown for FoliageFragrant: NoFoliage Type: Foliage Color(s): GreenFoliage Description: GreenTemperature: Above 60 °F (Above 16 )Humidity: Above Average to High (60% – 100%)Common Name: Korean Rock FernOther Name(s): Scientific Name: Polystichum tsus-simensePlant Type: House Plant