ADA Alternanthera reineckii ‘AR’

Alternanthera reineckii is a classic red stem plant prized for its deep burgundy to ruby foliage and strong architectural presence. It forms dense, upright stands that instantly add contrast and depth in Dutch- and nature-style aquascapes. With good light, CO₂ and nutrients, AR develops saturated colour and compact internodes.

Physical characteristics

• Height: 25–50 cm (trim to suit)

• Form: Upright stems with moderate internodes; bushy with regular topping

• Leaves: Elliptic to lanceolate; upper surface copper-red to wine red, undersides often purple

Aquarium requirements

• Lighting: Medium–high to high for best colour and compact growth

• CO₂: Recommended (≈15–25 mg/L) for density and vivid reds

• Fertilisation: Steady macros/micros; aim around NO₃ 10–20 ppm, PO₄ 0.5–2 ppm, good Fe/trace supply

• Substrate: Nutrient-rich aquasoil or supplement with root tabs (strong root feeder)

• Water parameters: pH 6.0–7.4; temperature 22–28 °C; soft–moderately hard; good flow helps deter algae

Planting & spacing
Group 3–7 stems, spacing 5–8 cm to allow light into the base. Plant with tweezers; avoid immediate shading by taller background stems.

Maintenance

• Trimming: Top every 1–3 weeks in high-energy tanks; replant tops, let bases reshoot

• Shaping: Stagger cuts to build domes/terraces; remove old shaded leaves at the bottom

• Stability: Keep CO₂ and fertiliser consistent to prevent colour wash-out

Propagation
Very easy from cuttings. Replant 6–10 cm tops or side shoots; they root rapidly in active substrate.

Aquascaping use

• Placement: Midground to background colour block

• Role: Focal accent or Dutch “street”; contrasts beautifully with fine green stems (Rotala, Myriophyllum), bright carpets (Lobelia mini), and pale rocks.

Common challenges & tips

• Pale/bronze instead of red: Increase light gradually, ensure iron/trace and avoid NO₃ starvation

• Leggy stems: Boost light/CO₂, trim more frequently to encourage side shoots

• Melt after replanting: Normal adaptation—leave rooted bases; new shoots follow

Alternanthera reineckii delivers classic red drama with reliable growth. Provide bright light, stable CO₂ and balanced nutrients for dense, richly coloured stands that anchor your aquascape.