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Saxifraga CortusifoliaSaxifraga cortusifolia

Also known as Cortusa Saxifrage · Saxifrage

  • Category: Ornamental, Flowering
  • Type: Herb
  • Sunlight: Prefers partial shade.
  • Water: Keep soil consistently moist.
  • Temperature: Prefers cool to moderate temperatures.
  • Habitat: Outdoor, Indoor

Saxifraga cortusifolia, a perennial herb from Japan, features attractive foliage and delicate pink flowers, blooming in late summer to autumn.

Saxifraga cortusifolia is a perennial herbaceous plant belonging to the Saxifragaceae family, commonly known for its attractive foliage and delicate flowers. This species is a member of the large and diverse genus Saxifraga, which is characterized by a wide array of adaptations and forms found across various global habitats. Saxifraga cortusifolia itself is notable for its ornamental appeal, making it a favored choice in rock gardens and shaded woodland settings where its unique characteristics can be appreciated. Physically, Saxifraga cortusifolia typically forms a basal rosette of leaves from which flowering stems arise. The plant generally reaches a modest height, often between 15 to 30 centimeters, with a spread that can be similar. Its leaves are a prominent feature, often ovate to broadly ovate in shape, with a distinctly lobed or toothed margin. The surface of the leaves can be somewhat textured, and they are typically arranged in a dense clump. The flowering stems are slender and bear inflorescences of small, yet striking, flowers. These flowers are usually white or pale pink, often with distinctive markings, such as red or purple spots, on their petals. The blooming period typically occurs in late summer to autumn, providing a welcome splash of color as other plants begin to fade. Following flowering, small capsules develop, containing numerous tiny seeds. The native distribution of Saxifraga cortusifolia is primarily in East Asia, with documented occurrences in regions such as Japan and Korea. It thrives in its natural habitat in shaded, moist environments, often found growing in rocky crevices, along stream banks, or in the understory of forests. These conditions provide the dappled light and consistent moisture that the plant prefers. For successful cultivation, Saxifraga cortusifolia requires similar conditions: a location that offers partial to full shade, protection from harsh midday sun, and well-drained soil that retains some moisture. It is particularly well-suited to rock gardens, alpine beds, or as a groundcover in woodland settings. Regular watering, especially during dry periods, is beneficial, but waterlogged conditions should be avoided to prevent root rot. While Saxifraga cortusifolia is primarily valued for its ornamental qualities, its ecological role within its native habitat contributes to biodiversity. As a flowering plant, it can attract small pollinators, and its seeds provide a food source for certain insects or birds. There is no widespread documented use of Saxifraga cortusifolia in medicinal, culinary, or significant economic applications. Its importance lies predominantly in its aesthetic contribution to garden landscapes and its representation of the diverse flora of its native regions. An interesting characteristic of Saxifraga cortusifolia, shared with many saxifrages, is its name, which derives from the Latin words "saxum" (rock) and "frangere" (to break), alluding to the historical belief that these plants could break rocks. While this is a poetic interpretation rather than a literal botanical process, it highlights the plant's typical habitat in rocky environments. The plant's ability to thrive in seemingly challenging locations, such as rock crevices, is a testament to its resilience and specialized adaptations for survival in such niches.

Photograph © 空猫 T. N · CC-BY-NC

Saxifraga Cortusifolia Care Summary

At-a-glance light, water, soil, and growing conditions from plant data

Light

Prefers partial shade.

40% intensity

Avoid direct, intense sun.

Water

Keep soil consistently moist.

60% intensity

Reduce watering in winter.

Soil

Well-draining, humus-rich soil. Slightly acidic to neutral pH.

50% intensity

Temperature

Prefers cool to moderate temperatures.

50% intensity

Avoid extreme heat.

Habitat

Outdoor, Indoor

50% intensity

Fertilizer

Feed lightly during the growing season.

30% intensity

Use balanced liquid fertilizer diluted.

Saxifraga Cortusifolia Toxicity

Safety information from plant toxicity data

Toxicity details for Saxifraga Cortusifolia
AttributeValue
Toxic for humansNo

0/5 intensity

Toxic for petsNo

0/5 intensity

EdibleNo

Saxifraga Cortusifolia Quick Facts

Key traits and growing stats from plant data

Plant Type
Herb
Plant Category
Ornamental, Flowering
Plant Place Type
Ground, Pot, Garden
Plant Environment
Outdoor, Indoor
Lifespan
Perennials
Plant Height
0.2-0.4 m
Spread
0.3-0.5 m
Growth Rate
Moderate
Dormancy
Semi-dormant in winter
Leaf Color
Green, Bronze
Leaf Type
Basal rosette, lobed
Flower Size
1-1.5 cm

Care guide for Saxifraga Cortusifolia

Watering, pruning, propagation, and repotting details from plant data

Water

Water regularly to maintain consistent soil moisture, especially during dry periods. Allow the top inch of soil to dry out slightly between waterings. Reduce watering in cooler months.

Pruning

Remove spent flower stalks to encourage further blooming and maintain a tidy appearance. Trim away any dead or damaged foliage as needed. Minimal pruning is generally required.

Propagation

Easily propagated by division of established clumps in spring or autumn. Stem cuttings can also be taken in late spring or early summer. Sow seeds in autumn or early spring.

Repotting

Repot container-grown plants every 1-2 years in spring, or when they become root-bound. Use a fresh, well-draining potting mix. Ensure the new pot is only slightly larger than the previous one.

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Flowering & Fruiting Cycles

Monthly activity intensity for bloom and fruit across both hemispheres.

Northern hemisphere

Flowering & fruiting calendar

Peak bloom · OctPeak fruit · Nov
FloweringFruiting
02468JanFebMarAprMayJunJulAugSepOctNovDecActivity intensityMonths72
Southern hemisphere

Flowering & fruiting calendar

Peak bloom · AprPeak fruit · May
FloweringFruiting
02468JanFebMarAprMayJunJulAugSepOctNovDecActivity intensityMonths72

Saxifraga Cortusifolia Names & Synonyms

Common names and botanical synonyms

Common Names

  • Cortusa Saxifrage
  • Saxifrage

Synonyms

  • Diptera cortusifolia (Siebold & Zucc.) Losinsk.
  • Saxifraga madida (Maxim.) Makino
  • Sekika cortusifolia (Siebold & Zucc.) H.Hara

Saxifraga Cortusifolia Taxonomy

Botanical classification

Taxonomic classification of Saxifraga Cortusifolia
RankName
kingdomPlantae
divisionTracheophyta
classMagnoliopsida
orderSaxifragales
familySaxifragaceae
genusSaxifraga
speciesSaxifraga cortusifolia

Saxifraga Cortusifolia FAQs

Answers based on plant encyclopedia data

What is the best soil for Japanese rockfoil?

Japanese rockfoil thrives in well-draining, humus-rich soil with a slightly acidic to neutral pH. Adding compost or leaf mold can improve soil structure and fertility.

How often should I water Saxifraga cortusifolia?

Keep the soil consistently moist but avoid waterlogging. Water when the top inch of soil feels dry, and reduce watering during the winter months.

Can Japanese rockfoil grow indoors?

Yes, Saxifraga cortusifolia can be grown indoors as a houseplant, provided it receives adequate light (bright, indirect light) and consistent moisture.

When does Japanese rockfoil bloom?

Japanese rockfoil typically blooms from late summer through autumn, producing delicate pink or white flowers on slender stems.

How do I propagate Japanese rockfoil?

Propagation is easily done by dividing established clumps in spring or autumn. Stem cuttings taken in early summer or sowing seeds in autumn/spring are also effective methods.