Mesembryanthemum crystallinum Red

Red Ice Plant

Botanical Name: Mesembryanthemum crystallinum 'Red'
Family: Aizoaceae
Origin: Southern Africa (naturalised in parts of coastal Australia)
Plant Type: Annual to short-lived perennial succulent groundcover

Overview

A low, spreading succulent groundcover that thrives in Adelaide's hot, dry and coastal conditions, Mesembryanthemum crystallinum 'Red' is the most visually dramatic form of the crystalline ice plant, prized for its vivid red foliage that intensifies in heat, drought and cooler conditions, creating a fiery carpet of colour across the garden. The fleshy leaves and stems are blanketed in tiny reflective bladder cells that sparkle in the sun like frost, giving the plant its iconic ice plant name.
From spring through summer it produces masses of small white to pale pink daisy-like flowers that open in full sun, adding a delicate contrast against the bold red foliage. Exceptionally hardy and virtually maintenance-free, this ice plant handles poor soils, salt-laden winds, reflective heat and dry coastal conditions with ease, making it one of the toughest and most eye-catching groundcovers available for South Australian gardens.

Key Features

• Mature Size: 10–20 cm H x 40–80 cm W (spreading mat-forming habit)
• Growth Rate: Fast; 20–40 cm spread per year under good conditions
• Foliage: Thick, fleshy succulent leaves and stems covered in sparkling crystalline bladder cells; vivid red to crimson colouring that intensifies in heat, drought, cool or stressed conditions; most striking in summer and autumn
• Flowers: Small white to pale pink multi-petalled daisy-like blooms; spring through summer; flowers open in full sun and close at night or on overcast days
• Fragrance: Not fragrant
• Seasonal Interest: Glittering red crystalline foliage year-round with white-pink flowers in spring through summer; foliage deepens to most intense red in summer heat and drought; may self-seed and return after dormancy
• Wildlife Value: Flowers attract bees, hoverflies and pollinating insects
• Tolerance: Extremely drought-tolerant; excellent heat tolerance; excellent wind tolerance; exceptional coastal salt tolerance (front-line suitable); handles reflective heat from paving and gravel; frost-sensitive and may die back in cold winters but often self-seeds and returns; tolerates poor, sandy and rocky soils
• Planting Density: Tight groundcover: 4 plants per m² (50 cm spacing); Standard groundcover: 2 plants per m² (70 cm spacing); Mass planting: 30–50 cm apart for a continuous low carpet
• Pet Friendly: Generally regarded as non-toxic; discourage chewing as with all succulents

Where It Works Best

• Sunlight: Full sun essential; best red foliage colour, flower production and crystalline sparkle achieved in full sun
• Soil: Free-draining sandy, gravelly or rocky soils; thrives in poor coastal limestone soils common across SA; excellent in raised beds, rockeries and containers; avoid heavy clay or waterlogged soils
• Water Needs: Establishment: light soak 1–2 times/week for 6–8 weeks. Established: very low water needs; deep soak every 2–3 weeks in extreme summer heat; minimal to no water in cooler months
• Maintenance: Virtually maintenance-free; trim back dead foliage after flowering if desired; allow to self-seed and naturalise in suitable spots; avoid overwatering or rich soils which cause soft, leggy growth and reduce red colouring
• Lifespan: 1–2 years (annual to short-lived perennial) but self-seeds readily and naturalises in suitable positions
• Climate Zones: Ideal for temperate, Mediterranean and coastal SA; Adelaide Plains, Fleurieu Peninsula, Yorke Peninsula, coastal regions and inland dry areas
• Soil pH: Highly adaptable; slightly acidic to strongly alkaline soils (pH 6.0–8.5); tolerates saline soils

Landscape & Design Ideas

• Coastal and seaside gardens for bold red groundcover colour, soil stabilisation and crystalline foliage texture
• Rockeries and gravel gardens where the vivid red foliage creates a dramatic contrast against pale stone and gravel
• Low-maintenance verges, nature strips and embankments that establish fast, tolerate neglect and hold soil on slopes
• Mixed succulent gardens paired with Carpobrotus, Lampranthus and Delosperma for a bold multi-textured succulent tapestry
• Contemporary minimalist landscapes paired with gravel, pavers and architectural plants for a fiery seasonal accent

Why You Will Love It

The Red Ice Plant is one of the most dramatic and effortless groundcovers you can plant in a South Australian garden. The vivid crimson foliage blazes in summer heat, the crystalline leaf texture sparkles in morning light, and it thrives on neglect in the exact conditions that challenge most plants, including poor soil, salt wind, relentless sun and dry summers. Set and forget; this plant only gets more impressive the tougher things get.