Polystichum luctuosum (P. tsus-simense)

Korean rock fern

Polystichum luctuosum (P. tsus-simense)

Korean rock fern

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Forest fern from East Asia
Filigree evergreen fronds
Ideal for subtropical humid forest terrariums

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Variation

Pot L - 7 x 7 x 8 cm (out of stock)

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Description

The Korean rock fern is commonly called Polystichum tsus-simense. However, it is also assigned to the species Polystichum luctuosum from southern Africa and Madagascar. The species is mainly found in subtropical East Asia, from northern India via China to Japan and Vietnam. It grows in evergreen humid forests. The dark to medium green, filigree, pinnate, evergreen fronds grow to about 20-40 cm long and are attached to an underground rootstock.

This fern grows in loose, humus-rich soil that is kept slightly moist and must neither dry out nor become waterlogged. When it is well established, it can be fed with a houseplant fertiliser. As a shade plant it does not need much light, but a bright position without direct sun is recommended. Higher humidity above 60 % is favourable. The Tsushima shield fern comes from a subtropical climate with humid summers and cooler, drier winters. Accordingly, a cooler winter dormancy at about 3-15 °C is optimal, during which the fern is kept drier.

Polystichum luctuosum is a graceful subtropical fern that makes an effective accent in smaller terrariums, especially when combined with moss, stones and wood. Although it comes mainly from areas with cool winters, it can also be used for tropical terrariums.

Profile

Polystichum luctuosum (P. tsus-simense)
Cultivation Options	As a ground plant in substrate
Growth Height	Approximately 40 - 50 cm under optimal conditions
Temperature	15 - 25 °C, frost-sensitive
Humidity	70 - 90%
Light Requirement	Shady to semi-shady; avoid direct sunlight
Watering	Regularly, keep substrate consistently moist but avoid waterlogging
Fertilization	Moderate during the growing season; every 6 - 8 weeks with diluted liquid fertilizer
Propagation	Spores, occasionally by division of the rhizome
Suitable for	Smaller to medium-sized terrariums, shady areas, moist environments

Cultivation Options

As a ground plant in substrate

Growth Height

Approximately 40 - 50 cm under optimal conditions

Temperature

15 - 25 °C, frost-sensitive

Humidity

70 - 90%

Light Requirement

Shady to semi-shady; avoid direct sunlight

Watering

Regularly, keep substrate consistently moist but avoid waterlogging

Fertilization

Moderate during the growing season; every 6 - 8 weeks with diluted liquid fertilizer

Propagation

Spores, occasionally by division of the rhizome

Suitable for

Smaller to medium-sized terrariums, shady areas, moist environments

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