Alternanthera bettzickiana 'Aurea' (the calico-plant)

Alternanthera bettzickiana 'Aurea' (commonly known as the calico-plant) is a striking perennial herb famous for its vibrant, golden-yellow and lime-green variegated foliage. Native to South America, it grows as a compact bushy plant reaching 20 to 50 cm in height. It is highly versatile, popular both as a terrestrial ground cover in frost-free gardens and as a colorful accent in aquariums, terrariums, and paludariums.

Core Plant Characteristics

Foliage: Small, slightly wavy, oval leaves with distinct yellow and green marbling.

Growth Habit: Creeping, dense, and bushy, spreading horizontally over time.

Stems: Multi-branched, rounding out at the base and becoming square-shaped near the tips.

Flowers: Produces very small, inconspicuous white flower clusters at the leaf joints during late summer.

Comprehensive Care Guide

Lighting Requirements

Intensity: High to moderate light is critical.

Duration: Provide 8 to 10 hours of bright light daily.

Impact: Insufficient light causes the bright golden color to fade into a dull, plain green.

Temperature & Climate

Ideal Range: 22°C to 28°C (72°F to 82°F).

Stability: Avoid sudden drafts, temperature spikes, or frost.

Outdoor Use: Suitable only for tropical, subtropical, or frost-free zones.

Soil & Substrate

Terrestrial/Emersed: Rich, clay-based soil that retains moisture well.

Aquatic/Submerged: A highly nutritious substrate is required to support its heavy root feeding habits.

Water Parameters (For Aquatic/Paludarium Use)

pH Level: 6.5 to 7.5 (tolerates up to 8.5).

Water Hardness: 4 to 20 dGH.

CO₂ & Circulation: While it can survive without it, adding CO₂ injection and maintaining good water flow greatly speeds up growth and improves vitality.

Nutrients & Fertilization

Iron Supplements: This plant is demanding when it comes to nutrients. Regular doses of iron-rich fertilizer are essential to maintain the intense golden coloration.

Maintenance & Propagation

Pruning: It grows at a moderate to fast pace. Regularly trim the tops to prevent the plant from overtaking its neighbors and to force a denser, bushier shape.

Propagation: Highly straightforward. Simply cut a healthy stem section and push it back into the substrate. New roots will anchor themselves and develop rapidly within a couple of weeks.

The "Melting" Phase: If you buy this plant in its dry, land-grown form (emersed) and submerge it in an aquarium, the old leaves may die off or "melt". Do not worry; this is normal as the plant transitions to its underwater form.