Polystichum tsussimense - Korean Rock Fern

Great at adapting to new environments, something which is ideal for a houseplant, this fern is happy as long as you keep its watering schedule pretty consistent and don't expect it to grow in the sun. From the centre of this plant sprout a whole host of verdant fronts, an explosion of greenery perfect for bringing the woodland into your home. It's also fully hardy so happy to be grown outdoors in a shady garden spot, giving some lush evergreen foliage and standout texture to your home. It's even been awarded the RHS' prestigious Award of Garden Merit. Whether it's enjoying life on your sideboard or in your garden borders, be sure to keep this plant happy with plenty of water, especially in summer - and, while it can be thirsty, make sure it's not sat too soggy, especially in winter.

Scientific Name
Polystichum luctuosum (many-rowed mournful plant)

Synonyms: Polystichum tsussimense, Aspidium luctuosum, Aspidium tsus-simense, Polystichum falcilobum, Polystichum herbaceum

Often sold as Polystichum tsussimense, a classification given to one specimen in 1875, this plant has recently been found to be the same species as Polystichum luctuosum; that name has been used since 1858, so is the one that's now accepted.

Common Name
Korean Rock Fern, Tsushima Holly Fern, Mourning Shield Fern

Origin
Native to parts of Africa, Europe and Asia: South Africa, China, Eswatini, Japan, Korea, Lesotho, Madagascar, Nepal, the Netherlands, Pakistan, Taiwan, Tibet, Vietnam and Zimbabwe

Light
Your Fern will be happiest in bright but indirect light; make sure it is shaded from direct sunlight.

Water
Let just the top layer of soil dry out; this fern loves consistent moisture. Outdoors, it may need watering in dry weather.

Humidity
A little moisture in the air is good for this plant. Keep it in above-average humidity to keep its leaves lush and green (and not brown and crispy)

Soil
Use a mix that's great at retaining moisture for your thirsty plant - one designed for ferns will work well. Elements to look out for in the mix include coir, perlite and sand. Repot every few years or when the plant has doubled in size - the best time of year for it is spring.

Food
Your fern doesn't need too much extra food; a light feed throughout the growing season (spring and summer) will be enough. Fertilise about once a month using half strength fertiliser.

Temperature
Grows well as a houseplant in temperatures between 15-25°C; it is fully hardy, so won't be bothered by colder temperatures in winter.

Pet-safe
Yes, but too much nibbling won't be good for pets, small humans or the plant!

Sprouts Top Tips
If fronds become brown or tired-looking, gently remove them at the base to encourage fresh new growth. This fern also makes a great underplanting in large indoor planters beneath taller foliage.