How to Grow Red Alternanthera
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Red Alternanthera
Alternanthera reineckii 'Red'
herbA vibrant aquatic and semi-aquatic plant prized for its stunning deep red to burgundy foliage. Alternanthera reineckii 'Red' is a popular choice for aquariums, paludariums, and ornamental water gardens, offering dramatic color contrast. It is relatively easy to grow and adapts well to both fully submerged and partially emerged conditions.
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Example Red Alternanthera timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Alternanthera
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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Harvest Red Alternanthera
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Red Alternanthera dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in warm zones 10-11; can be grown indoors year-round in cooler climates
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Get my Red Alternanthera timeline →Growth Stages
Establishment
2-3 weeksNew cuttings or young plants develop initial root systems; foliage may appear pale or green as the plant acclimates
Provide bright light and consistent fertilization. Avoid moving the plant frequently. Maintain stable water conditions. Begin weekly liquid fertilization.
Vegetative Growth
3-6 weeksPlant develops multiple stems and new leaves; red coloration begins to emerge with proper lighting and nutrients
Increase light intensity to 8-12 hours daily. Begin iron supplementation. Trim side shoots to encourage bushier growth. Maintain optimal temperature.
Red Coloration Development
4-8 weeksFoliage intensifies from green to deep red or burgundy; plant reaches vibrant ornamental appearance
Ensure strong light (critical for color). Supplement with iron and potassium weekly. Maintain consistent fertilization schedule. Water temperature should remain warm.
Mature Growth
OngoingPlant reaches full size with dense foliage, deep red coloration, and potential flower production in emersed conditions
Maintain regular fertilization and light. Prune regularly to maintain shape and density. Continue weekly water changes. Monitor for nutrient deficiencies.
Propagation
Continuous harvest possibleSide shoots and stem cuttings can be harvested to create new plants
Take 2-3 inch cuttings from healthy stems. Remove lower leaves. Plant in substrate with at least 2 leaf nodes buried. High light and fertilization encourage rooting.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Improve water circulation, reduce light duration, increase water changes, add aquatic plants with strong nutrient uptake, use algaecide as last resort
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Ensure good water circulation, reduce plant density, increase water changes, remove decaying portions, maintain proper CO2 and oxygen levels
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Supplement with comprehensive aquatic plant fertilizer, add iron chelate for red coloration, increase light intensity, add CO2 if using high-light setup
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This is often an acclimation response; gradually introduce to submerged conditions, maintain stable water parameters, increase light and fertilization, be patient as plant recovers
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Manually remove snails, reduce food sources, use snail traps, add snail-eating fish if compatible with setup, use copper-free treatments only
Uses
Aquarium decoration and aquascaping
HouseholdAlternanthera reineckii 'Red' is a flagship ornamental plant in freshwater aquariums, prized for creating striking red-toned aquatic landscapes. Its deep burgundy color provides dramatic contrast against green plants and serves as a focal point in planted tanks. [source]
Paludarium and terrarium cultivation
HouseholdThe plant thrives in paludarium setups where it can be grown both partially submerged and above the waterline. It adapts well to humid conditions and creates attractive vertical plantings in semi-aquatic displays. [source]
Aquatic habitat improvement
WildlifeIn planted aquariums, Alternanthera reineckii 'Red' provides oxygenation, nutrient uptake, and shelter for small fish and aquatic invertebrates. It helps reduce algae competition and improves overall water quality. [source]
Aquascaping and plant propagation hobby
CraftThe plant's ease of propagation and striking appearance make it ideal for aquascaping enthusiasts and plant propagation projects. It is frequently used in competition aquascapes and planted tank designs. [source]
Ethnobotanical and traditional uses
MedicinalAlternanthera species have been used in traditional South American medicine for digestive and anti-inflammatory purposes. While 'Red' is primarily ornamental, the genus has potential phytochemical applications. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Propagate by taking 2-3 inch stem cuttings from healthy growth tips or side shoots. Remove the lower 1-2 leaves to expose nodes, then plant cuttings in substrate with at least 2 leaf nodes buried. Cuttings root within 1-2 weeks under bright light and with fertilization. Regularly trim the main plant to encourage bushier growth and promote the vibrant red coloration. Prune during water changes to minimize stress.
Fun Facts
- 🌱 Alternanthera reineckii 'Red' is native to South America and is sometimes called 'Red Calico Plant' or 'Scarlet Temple' when grown terrestrially, reflecting its stunning deep red coloration that intensifies under high light.
- 🌱 The plant's red coloration is enhanced by high-intensity lighting and iron supplementation; under low light, it may revert to a greenish hue, making it an excellent indicator of light conditions in aquariums.
- 🌱 In addition to its aquatic form, Alternanthera reineckii 'Red' can be grown as a terrestrial ornamental houseplant, where it displays the same striking red foliage and adapts well to humid indoor conditions.
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