How to care for a Polystichum tsus-simense | Korean Rock Fern

The Polystichum tsus-simense, known to some as “The Korean Rock Fern” boasts glossy blueish-green fronds, black stems, and a pinnae that’s oblong and spiny-toothed. He looks perfect in the house as he stays fresh and lush through the seasons but he can also be placed outside in a garden. As long as the garden isn’t too wet or cold.

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  • Frequent
  • Every 1-2 years
  • Low
  • Medium to low light
  • Toxic
  • Once a month during Spring & Summer

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  • The Korean Rock Fern is native to East Asia. It's common name comes from it's ability to grow in rock walls.
  • Korean Rock Ferns are not known for being an air purifier.
  • Some parts of the Korean Rock Fern are poisonous to animals and humans so take care when around them or if pets are nearby.
  • The Korean Rock Fern likes consistently moist soil, so water frequently when the top 1 inch of the soil is dry.
  • Not a fan of direct sunlight, prefers medium to low light. North-facing windows are a excellent spot.
  • Would benefit from a dose of all-purpose houseplant fertilizer once a month during the growing season (Spring and Summer).
  • Will need to be repotted when he starts to show signs of being root bound, this is usually about every one or two years.
  • As soon as you spot a dead or damaged frond, it would be best to trim it off using clean scissors or pruning shears.
  • Generally disease and pest free, but always keep an eye out for any potential problems!

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