This small fern will make a pretty addition to your houseplant collection or outdoor garden.

Forced air vents, fans, and cold drafts should be avoided.

Avoid planting these ferns near aggressively spreading plants such aslilyturf (Liriopespp.

korean rock fern polystichum tsus-simense

Credit:David J. Stang

)orEnglish ivy (Hedera helix).

Dig a hole twice the width of the root ball and set in the center of the hole.

Sprinkle some granular fertilizer around the root ball and refill with soil.

Water gently and maintain moisture throughout the first growing season.

In a container, potting mix with added perlite will ensure ample moisture retention while maintaining proper drainage.

Temperatures over 90F or lower than 32F will slow growth or kill plants.

Maintain humidity around plants outdoors byapplying an organic mulch around uncovered soil.

Potting and Repotting

When grown indoors, Korean rock ferns can berepotted anytime during the year.

Due to clumping growth, plants only require repotting when they have begun to outgrow their current pot.

Pests and Problems

Korean rock ferns experience few diseases aside from root rot andmealybugs.

Treat mealybugs with an organic pesticide such asneem oil.

Individual mealybugs can be removed with your fingers if you aren’t squeamish.

), andlungwort (Pulmonariaspp.)

Ferns pair well with other moisture-loving houseplants such aspeace lilies(Spathiphyllumspp.

),pilea (Pileaspp.

), andpothos(Pothosspp.).

Frequently Asked Questions

Unlike many other plants, Korean rock ferns will grow in a north-facing window.

However, they will do better with brighter, indirect light.