Fragile rockbrake (Cryptogramma stelleri)

Fragile rockbrake

Also known as: Steller's rock brake

Fragile rockbrake is a perennial fern that grows in high-altitude, well-watered rock crevices, with a preference for limestone. The stems and petioles of fragile rockbrake are easily damaged, which along with its growth habitat gives it its name.

Scientific classification

Species

Fragile rockbrake (Cryptogramma stelleri)

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Perennial

Lifespan

Evergreen

Leaf type

0 - 21 ℃

Ideal Temperature

Images of Fragile rockbrake

Distribution of Fragile rockbrake

Distribution Map

Fragile rockbrake is naturally found across a broad expanse of northern Asia, ranging from the eastern Himalayas to the boreal regions. Its distribution extends to temperate areas of northeastern Asia. It thrives in varied climates, from mountainous terrains to forested zones within these major regions.

Native

Cultivated

Invasive

Introduced

No species reported

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Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Fragile rockbrake

Every week

Water

Partial sun

Sunlight

0 - 21 ℃

Ideal Temperature

Water: Originating from moist rock crevices, fragile rockbrake thrives in humid environments and requires weekly watering for optimal growth. This outdoor fern benefits from natural rainfall, ensuring consistent moisture and supporting its seasonal growth patterns while exhibiting moderate drought tolerance.

Fertilize: For fragile rockbrake, use balanced nutrition fertilizers with a diluted water-soluble mix, applying monthly in spring and early summer, then reducing in fall and stopping in winter. Fertilize on moist soil in the morning, avoiding foliage contact, ensuring optimal growth by adjusting as needed.

Pruning: Fragile rockbrake thrives with early to late spring pruning of damaged or dead fronds to promote new growth and maintain tidiness. Minimal pruning minimizes stress. Removing spent fronds reduces disease and pest risks, aligning with the plant's active growth phase for optimal health.

Propagation: Fragile rockbrake can be propagated using cuttings from healthy, mature fronds, including a segment of rhizome. Place in a sterile, well-draining medium with consistent moisture. Maintain high humidity and stable temperatures to encourage rooting and new growth, leading to independent plants.

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