Bergenia
Bergenia crassifolia
Bergenia (Bergenia crassifolia), commonly known as Elephant's Ears, Siberian Tea, or Pigsqueak, is a hardy, clump-forming perennial belonging to the family Saxifragaceae. It is one of the most reliable and low-maintenance ornamental plants in temperate gardens, prized for its bold, leathery foliage and early spring flower clusters.
• The common name "Elephant's Ears" refers to the plant's large, rounded, thick leaves that resemble an elephant's ears
• "Pigsqueak" derives from the squeaking sound produced when two fresh leaves are rubbed together
• One of the earliest perennials to bloom in spring, often flowering while snow is still on the ground
• Widely used in European and Asian horticulture since the 18th century
• The genus Bergenia was named in honor of the German botanist Karl August von Bergen (1704–1760)
Taxonomy
• Native range spans from the Altai Mountains of Siberia through Mongolia, northern China (Xinjiang, Manchuria), and into Kazakhstan
• Grows naturally at elevations of 1,000 to 3,000 meters in alpine meadows, rocky slopes, and forest margins
• The species was introduced to European gardens in the mid-18th century and has since become a staple of temperate horticulture worldwide
• The genus Bergenia comprises approximately 10 species, with B. crassifolia being the most widely cultivated and cold-hardy
• In its native habitat, it is an important early-season nectar source for pollinators emerging from winter dormancy
Rhizome & Root System:
• Thick, fleshy, creeping rhizome (up to 3–5 cm in diameter), growing partially above ground
• Rhizome is brown to dark brown, knobby, and branches extensively, enabling vigorous vegetative spread
• Fibrous root system anchors firmly in rocky or poor soils
Leaves:
• Large, thick, leathery, and glossy; broadly ovate to nearly circular (10–30 cm long, 8–25 cm wide)
• Margins are entire to slightly wavy, often with a subtle reddish tinge
• Dark green in summer, turning striking shades of bronze, burgundy, red, or purple in autumn and winter (especially in colder climates)
• Petioles are stout, 5–15 cm long, often reddish
• Leaves are arranged in a dense basal rosette, overlapping like tiles
Flowers:
• Bloom in early to mid-spring (March to May, depending on climate)
• Flowers are borne on thick, erect, reddish scapes (flower stalks) rising 20–50 cm above the foliage
• Inflorescence is a dense, corymbose cluster (cyme) of numerous small flowers
• Individual flowers are bell-shaped to cup-shaped, ~1–2.5 cm in diameter, with 5 sepals and 5 petals
• Color ranges from pale pink to deep rose-purple; some cultivars produce white flowers
• Each flower has 10 stamens and a superior ovary
Fruit & Seeds:
• Fruit is a two-valved capsule containing numerous tiny, ellipsoid, dark brown seeds (~1 mm long)
• Seeds are dispersed by wind and gravity
• Prefers partial shade to full sun; in hotter climates, afternoon shade is beneficial
• Tolerates a wide soil pH range (5.0–7.5) and grows in poor, rocky, or clay soils
• Cold-hardy to USDA Zones 3–8 (tolerating temperatures as low as −35°C / −30°F)
• Drought-tolerant once established, though performs best with consistent moisture
• Naturally found in alpine meadows, rocky slopes, scree fields, and open deciduous forests
• Provides early-season nectar and pollen for bees, hoverflies, and other pollinators
• Deer and rabbit resistant due to the thick, leathery foliage
• Evergreen leaves provide year-round ground cover, helping to suppress soil erosion on slopes
Light:
• Partial shade to full sun
• In hot climates (USDA Zones 7–8), afternoon shade prevents leaf scorch
• In cooler climates (Zones 3–5), full sun promotes the best autumn foliage coloration
Soil:
• Adaptable to a wide range of soil types — clay, loam, sandy, or rocky
• Prefers humus-rich, well-drained soil but tolerates poor and compacted soils
• Optimal pH: 5.5–7.0
Watering:
• Water regularly during the first growing season to establish a strong root system
• Once established, moderately drought-tolerant; water during prolonged dry spells
• Avoid waterlogged conditions, which can cause rhizome rot
Temperature:
• Extremely cold-hardy; tolerates winter temperatures down to −35°C (−30°F)
• Optimal growing range: 10–24°C
• Foliage color intensifies with exposure to cold autumn temperatures
Propagation:
• Division: the most common and reliable method; divide clumps in early spring or autumn by cutting the thick rhizome into sections, each with at least one growing point
• Seed: sow fresh seeds in autumn; germination is slow and erratic (may take several months)
• Rhizome cuttings: sections of rhizome planted horizontally in moist soil will produce new shoots
Common Problems:
• Rhizome rot → caused by poorly drained, waterlogged soil
• Leaf spot (fungal) → remove affected leaves and improve air circulation
• Vine weevil larvae → feed on roots and rhizomes; treat with nematode biological control
• Slugs and snails → may damage young leaves; use organic deterrents
• Sun scorch → brown, crispy leaf edges in excessive direct sun without adequate moisture
Fun Fact
Bergenia crassifolia has a long history of use in traditional Siberian and Mongolian medicine and as a beverage tea. • In Siberia, the leaves of B. crassifolia have been brewed as "Siberian tea" (also called "Altai tea") for centuries — a practice dating back to indigenous peoples of the Altai region • The leaves contain high concentrations of tannins (up to 20–25% of dry weight), giving the tea an astringent, earthy flavor • Traditional uses include treatment of digestive ailments, mouth inflammations, and as a general tonic • The species name "crassifolia" is Latin for "thick-leaved" (crassus = thick, folia = leaf), a direct reference to its notably fleshy foliage • Bergenia's extraordinary cold tolerance is due to the high concentration of sugars and phenolic compounds in its leaves and rhizomes, which act as natural antifreeze — lowering the freezing point of cellular fluids and preventing ice crystal damage • The dramatic winter color change (green to deep burgundy) is caused by the accumulation of anthocyanin pigments, which are thought to protect leaf cells from UV damage and oxidative stress during freezing temperatures • A single Bergenia clump can live for decades and spread to form a dense mat over 1 meter across, making it one of the longest-lived and most persistent perennials in the garden
Learn more
