How to Grow Small-growing tropical plants for terrariums

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Small-growing tropical plants for terrariums

Various species (e.g., Selaginella, Fittonia, Peperomia, Begonia)

flower

Small tropical plants suitable for terrarium cultivation include moisture-loving, compact species that thrive in humid, enclosed environments. These plants are ideal for creating miniature tropical landscapes in glass containers, vivariums, and closed terrariums. Common choices include ferns, begonias, peperomias, fittonias, and selaginellas.

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Example Small-growing tropical plants for terrariums timeline · Pittsburgh, PA (Zone 6b)

  1. Plant Small-growing tropical plants for terrariums

    Around Apr 17

    Near Pittsburgh's average last spring frost.

  2. Tend & protect

    Late spring–summer

    Watering, feeding, and pest-watch reminders.

  3. First Small-growing tropical plants for terrariums blooms

    Mid-to-late summer

    Before the first fall frost (≈ Nov 8)

Sample dates for Pittsburgh, PA. Sign up to get exact Small-growing tropical plants for terrariums dates for your own zip code.

Growing Conditions

☀️
Sun: Bright, indirect light; 12-14 hours daily under grow lights or near east/west-facing windows; avoid direct sun which causes leaf scorch
💧
Water: Keep soil consistently moist but not waterlogged. In closed terrariums, water sparingly as the sealed environment recycles moisture; mist open terrariums 2-3 times weekly. Reduce watering in winter.
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Spacing: 3-6 inches between plants depending on mature size; allow room for air circulation inches
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Days to maturity: Varies by species; generally 30-90 days to establish; ongoing growth for 1-3 years in stable terrariums
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Planting depth: Plant to depth equal to root ball; do not bury crowns; shallow planting recommended for small species

Soil

Type: Light, well-draining potting mix with high organic matter; peat moss, sphagnum, coconut coir, and perlite blend
pH: 5.5-6.5
Amendments:
Sphagnum moss Orchid bark Activated charcoal (for closed terrariums) Coconut coir

Growing Zones

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Zones 10-11; grown indoors in cooler climates

10a 10b 11a 11b

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Growth Stages

1

Establishment

1-2 weeks

Freshly planted cuttings or seedlings are acclimating to terrarium humidity and light conditions. Leaves may appear slightly wilted initially.

Maintain high humidity (70-90%); avoid over-watering; ensure good drainage; monitor for fungal issues in closed systems. Mist lightly daily in open terrariums.

2

Vegetative Growth

4-12 weeks

Plant develops new leaves, stems, and root system. Foliage becomes fuller and more vibrant; new growth appears regularly.

Provide stable humidity and bright indirect light; maintain consistent moisture; fertilize monthly with diluted liquid fertilizer (half-strength); pinch growing tips to encourage bushiness.

3

Mature Foliage

Ongoing (months to years)

Plant reaches desired size with dense, attractive foliage. For flowering species, flower buds may begin to form.

Continue regular misting and moisture management; prune leggy growth; maintain temperature 65-80°F; reduce fertilizer frequency to every 6-8 weeks.

4

Flowering (if applicable)

2-8 weeks depending on species

Species like begonias and African violets produce delicate flowers in shades of pink, white, red, or purple. Blooms last 2-4 weeks.

Ensure adequate light for flower production; maintain humidity but avoid wetting flowers; continue regular care; do not move container during blooming.

5

Maintenance

Ongoing (1-3+ years)

Plant stabilizes in terrarium; growth slows as it reaches equilibrium with environment. Long-term health and visual appeal maintained.

Prune overgrown shoots; replace spent soil every 12-18 months in open terrariums; monitor for pests and disease; adjust light/humidity as needed seasonally.

Companion Planting

Plan your garden →

Plant with:

Fittonia (nerve plant) Peperomia Begonia (rex, wax varieties) Selaginella (spike moss) Soleirolia soleirolii (baby tears) Episcia (flame violet) Pellaea (button fern) Adiantum (maidenhair fern) Maranta (prayer plant) Strobilanthes (Persian shield)

Avoid planting near:

Cacti and succulents (require different moisture levels) Large-growing tropical plants (shade small plants) Mint family herbs (aggressive growth) Ivy species (can overtake terrarium) Plants requiring dry dormancy periods

Common Pests

  • Increase humidity; mist foliage; isolate affected plant; apply neem oil or insecticidal soap; improve air circulation in terrarium

  • Remove with cotton swab dipped in rubbing alcohol; treat with horticultural oil; isolate plant; check roots for root mealybugs

  • Allow soil surface to dry slightly between waterings; use sticky traps; reduce organic matter in soil; apply mosquito dunks (BTi) if severe

  • Remove manually with soft brush; treat with neem oil every 7-10 days; improve air circulation; isolate heavily infested plants

  • Improve air circulation and reduce humidity slightly; remove affected leaves; apply sulfur dust or fungicide spray; avoid overhead watering

  • Ensure excellent drainage; reduce watering frequency; repot in fresh soil; remove rotted roots; use activated charcoal in soil

Uses

🏠

Miniature Landscape Display

Household

Small tropical plants create living artwork in glass terrariums, vivariums, and glass domes. They add natural beauty to desks, shelves, and living spaces while improving indoor air quality through transpiration. [source]

🏠

Humidity Regulation and Closed-System Ecosystems

Household

Closed terrariums create self-sustaining microclimates where plants release moisture that condenses on glass and returns to soil, reducing watering frequency. This educational aspect demonstrates ecological cycles. [source]

🍳

Edible Terrarium Plants (Peperomia species)

Culinary

Some peperomia species produce small peppery fruits and leaves used as garnish or seasoning. They add flavor and visual interest to terrariums while remaining edible. [source]

💊

Traditional Herbal Uses

Medicinal

Certain begonias and fittonia species have been used in traditional medicine for minor ailments. Begonias contain oxalic acid and have been studied for anti-inflammatory properties in folk medicine. [source]

🦋

Tropical Plant Propagation and Biodiversity

Wildlife

Terrariums enable home propagation of rare and endangered tropical species, supporting biodiversity conservation. Growing these plants indoors reduces pressure on wild populations and preserves genetic diversity. [source]

This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.

Harvest Tips

Terrarium plants are grown for foliage and ornamental value rather than harvest. Prune regularly to maintain shape and size—remove dead leaves, leggy stems, and spent flowers. Pinch growing tips to encourage bushiness. Propagate by taking 2-3 inch stem cuttings with 2-3 nodes and rooting in moist sphagnum moss. Gently remove individual plants if they outgrow the terrarium and replace with new specimens.

Fun Facts

  • 🌱 The Wardian case, a sealed glass terrarium invented in 1829 by Dr. Nathaniel Bagshaw Ward, revolutionized plant transport and indoor gardening by creating stable humid microclimates that mimic tropical rainforest conditions.
  • 🌱 Fittonia plants (nerve plants) exhibit dramatic 'fainting' behavior, wilting when thirsty and perking up within hours of watering—a visual indicator of their water needs that makes them excellent for teaching plant physiology.
  • 🌱 Many small tropical terrarium plants originated in rainforest understories where they evolved to thrive in 60-80% humidity, dappled light, and consistently warm temperatures—conditions perfectly replicated in glass terrariums.

Gardening Terms

New to gardening? Learn about terms used in this guide:

pH

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