Polystichum tsus-simense

Plants are supplied in standard nursery pots.

Polystichum tsus-simense

Korean Rock fern, Tsus-sima Holly Fern

The 'Korean Rock Fern' is a dainty holly fern native to Korea, China and Japan. Small in stature with glossy green leaves that contrast nicely with black scales and leaf bases. Evergreen and full hardy this fern is easy to grow in moist, free draining soil in sheltered spots in partial to full shade.

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Polystichum tsus-simense is often grown as a greenhouse plant to be admired at close quarters yet is perfectly hardy. Can reach an deventual height of 45cm, with a spread of 30cm.

In habitat this fern is found on forest floors and rocky slopes thus making it a perfect fern for growing in the rocky fern garden or at the front of a shaded border. The name 'Tsus-sima Holly Fern' and specific epithet refers to the Island of Tsus-sima, or Tsushima  which is part of the Japanese archipelago.

Polystichum tsus-simense care-

Cultivation- Easy to grow in moist, well drained soils. Protect from winter wet.

Pruning- Remove any dead or damaged fronds as needed.

Pests & Diseases- Generally pest and disease free.

Polystichum tsus-simense Identification Sheet

Korea, Japan, China, Thailand
Species / Cultivar
Common name(s)
Korean Rock fern, Tsus-sima Holly Fern
Part shade, moist well-drained soil
Eventual height
Eventual spread
Fully hardy
Skill level
Frequently asked questions about ground ferns

What is an evergreen fern?

Evergreen plants are species of plants that are adapted to keep their foliage all year round. They are ideal to provide year-round interest, as opposed to deciduous plants what lose their leaves in winter. 

Can you keep ferns in a pot?

Ferns can grow in pots without any problem. They will grow in most places where other plants will fail to thrive. Their fibrous root system will expand quite fast in rich, well drained soil with an abundance of organic matter. 

Can I keep an outdoor fern indoors?

Ground ferns can be kept indoors also. They can be kept indoors over the winter, provided you mist them every other day to prevent the tips from getting brown.

Are coffee grounds good for ferns?

Coffee grounds are in general very acidic. You can apply once a year, in spring, coffee grounds to the ferns to acidify the soil, however you should stay away from doing this too often as high acidity in the soil may inhibit growth. 

Can I use Epsom salts on my ferns?

Epsom salts are made from a compound called magnesium sulphate. Magnesium is an essential component of the chlorophyll in the leaves. Plants in pots can benefit from extra magnesium, as many of the nutrients get washed away by rain and watering.

Use two teaspoons for every 5 litres of water and apply once a month in the growing season. This will help the leaves have a rich, deep dark green colour. 

Outdoor plants pot sizes
Outdoor plants pot sizes

With items such as ferns, juvenile tree ferns and herbaceous plants it is difficult to give the exact size of each species when such a wide range of plants are grown so we specify standard pot sizes to give an indication of the size and/or age of the plant you are buying.

Sometimes the pot size might vary slightly from the standard or we might listed as 2-3 litre pot, depending on the growers we purchased them from. However, the sizes of the plants are similar in height and spread.

Sometimes the plants might be photographed in decorative pots. However, please bear in mind that our plants are kept in plastic nursery pots.

Plants measurements
Plant measurements

For the outdoor plants, that are meant to be planted in the ground, the height of the pot is excluded from the measurement. The height is measured from the top of the pot to the tallest leaf or branch of the plant.

All plants are measured when brought to our nursery, however, due to natural factors, the actual size of the plant might change over time due to adjustments to the environment. When picking multiple plants for an order, we aim to pick matching plants.

Plant warranties

We can guarantee that the plants leave our nursery disease free, but weather and local conditions might affect their survival. Make sure you always make an informed purchasing decision.

The plants that leave our nursery are in the best condition, free of disease. Kept in adequate conditions (positioning and care), the plants are guaranteed for 3 months if they are planted in the ground or one year if they are kept in their original pots. Return policy applies only to plants that are in their original pots.

Read more about our warranty policy >>>

Delivery information

Due to the nature of the consignments, the courier's drivers are not insured to carry goods through your property. The standard delivery location is the border of your property or the entrance of a communal space. If other arrangements need to be made, please get in touch with us as soon as the order is placed. Vouchers and small boxes can be posted through the letterbox, provided there is unrestricted access to it. 

Please make sure you leave delivery instructions, at checkout, in case you won't be at home when the courier delivers.







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Reviews (3)

Rated 5.00 on the scale 1 - 5 based on 3 customer reviews
Good Healthy Plants
verified_userVerified purchase
Healthy plants arrived in excellent condition as they were well packaged
Product quality
Customer service
Courier service
Beautiful Evergreen Ferns
Ordered three of these ferns. Arrived in lovely condition and have established well in my garden in a shady spot (it gets no direct sun due to some high fences). Lovely green fern adding some structure and interest in my small north facing garden. Will order more ferns from this nursery and highly recommend
Product quality
Customer service
Courier service
verified_userVerified purchase
Superb service. Plant arrived quickly in perfect condition and well packaged. Thank you.
Product quality