How to Grow Pearl Plant, Baby Tears Plant

Pearl Plant, Baby Tears Plant

Hemianthus micranthemoides

herb

A delicate, trailing aquatic plant native to North America, characterized by tiny oval leaves and small white flowers. Commonly used in aquariums and paludariums for its aesthetic appeal and ease of propagation. Often employed as a background or mid-ground plant in freshwater aquascaping.

Growing Conditions

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Sun: Moderate to high light; 10-12 hours daily in aquariums (use LED grow lights rated 8-10 watts per gallon for optimal growth)

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Water: Requires fully or partially aquatic conditions with consistent water parameters. Prefers stable temperatures between 65-75°F (18-24°C). Tolerates some water column variation but thrives with gentle circulation. Ensure regular water changes (25-30% weekly) to maintain water quality.

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Spacing: 1-2 inches between stems for optimal growth and light penetration inches

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Days to maturity: 30-45 days to establish and begin trailing; continuous growth thereafter

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Planting depth: Plant stem cuttings 0.5-1 inch into substrate; roots will develop from nodes within 1-2 weeks

Soil

Type: Aquatic substrate (nutrient-rich aquarium soil, sand, or gravel) or moist terrarium soil

pH: 6.0-7.5

Amendments:

Root tabs or aquarium fertilizers for nutrient supplementation Liquid all-in-one fertilizers (macronutrients and micronutrients) Iron supplements for vibrant leaf coloration

Growing Zones

Find your zone →

Thrives indoors in controlled aquatic environments; outdoor cultivation possible in warm climates (zones 9-11) as a marginal plant

Not applicable - aquatic/terrarium plant

Growth Stages

Acclimation & Rooting

1-2 weeks

Newly planted stems appear slightly stressed; leaves may lighten as root system develops

Avoid major water changes; maintain stable light and temperature; ensure low water flow to reduce stress

Vegetative Growth

2-4 weeks

Stems produce new nodes and leaves rapidly; plant begins trailing if not anchored; foliage deepens in color

Provide consistent high lighting; fertilize weekly with all-in-one or macronutrient supplements; trim upper stems to encourage bushier growth

Established Growth & Branching

3-8 weeks

Plant becomes dense and bushy with lateral branching; small white flowers may appear on mature stems

Continue regular fertilization and high lighting; trim as needed to maintain desired shape; remove lower leaves prone to algae growth

Trailing & Propagation

Ongoing

Long stems trail from anchor point; plant reaches mature form and produces viable stem cuttings

Prune trailing stems and replant cuttings to propagate; maintain consistent care to prevent melt-down

Companion Planting

Plan your garden →

Plant with:

Rotala rotundifolia Ludwigia repens Alternanthera reineckii Anubias barteri Eleocharis acicularis Limnophila sessiliflora

Avoid planting near:

Large aggressive plant species that create heavy shade Fast-growing stem plants competing for nutrients in small tanks Herbivorous fish that consume delicate foliage (silver dollars, plecos)

Common Pests

Reduce light duration to 8-10 hours; increase water circulation; perform manual removal; consider algae-eating fish (amano shrimp, SAE)
Manual removal with tweezers; reduce phosphate levels; use fish/shrimp that consume brush algae; hydrogen peroxide spot treatment (2-3 ml per 10 gallons)
Remove affected portions immediately; improve water circulation and quality; maintain stable water parameters; perform 50% water change
Dose with comprehensive liquid fertilizers; use root tabs; increase water column fertilization; verify light levels are adequate

Uses

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Aquascaping & Tank Design

Household

A popular foreground to mid-ground stem plant in freshwater planted aquariums, used for creating naturalistic aquatic landscapes. Its delicate appearance and bright green color provide contrast and visual interest in aquascaping designs. [source]

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Paludarium & Terrarium Cultivation

Household

Thrives in humid terrarium and paludarium settings where it can grow both submerged and emergent. Often used as a trailing decorative element in bioactive terrariums and moisture-controlled displays. [source]

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Aquatic Habitat & Fish Spawning

Wildlife

Provides shelter, spawning medium, and food source for small aquatic organisms including fish fry and microorganisms. The dense foliage creates ideal refuge for invertebrates and juvenile fish in aquatic ecosystems. [source]

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Vegetative Propagation & Aquatic Propagation

Household

Highly propagable through stem cuttings, making it ideal for beginners learning plant propagation techniques. Cuttings root rapidly and can be shared with other aquarists or used to fill additional tanks. [source]

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Oxygenation & Water Quality Improvement

Household

As a photosynthetic plant, it produces oxygen during daylight hours and actively absorbs excess nitrogen and phosphate compounds, helping to maintain healthy water chemistry and reduce algae blooms. [source]

Harvest Tips

For propagation, cut 2-3 inch stem segments with at least 3-4 nodes. Remove lower leaves and replant cuttings into substrate where they will root within 1-2 weeks. Prune regularly to maintain shape and encourage bushier growth; remove yellowed or damaged leaves to prevent decay.

Fun Facts

🌱 Hemianthus micranthemoides is endemic to North America, specifically found in wetland regions of the southeastern United States, making it a true native aquatic plant with significant ecological importance.
🌱 The plant's common name 'Pearl Plant' derives from the appearance of small white flowers that emerge on mature stems, resembling tiny pearls; however, flowering is relatively rare in fully submerged aquarium conditions.
🌱 This species exhibits remarkable phenotypic plasticity—it can grow in fully submerged, partially emergent, or emersed forms, adapting its leaf structure and growth pattern depending on environmental conditions, making it versatile for various growing setups.

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