Introduction

Ctenanthe burle-marxii (Fishbone Prayer Plant, family Marantaceae) is native to Brazil, producing unique grey-green to silver leaves with irregular dark green fishbone-pattern markings along the midrib and lateral veins, with a contrasting purple underside. Named after the famous Brazilian landscape architect Roberto Burle Marx. One of the most distinctive small prayer plants with a pattern unlike any other Marantaceae.

Leaves are oblong to elliptic, 15–25 cm long, with a pale grey-green to silver background and dark green irregular markings following the fishbone venation pattern. The marking pattern is variable between leaves, creating a naturally artistic composition. Undersides are deep reddish-purple. Petioles are short, reddish. Growth is compact, clumping from short rhizomes. Indoor height 25–50 cm. The prayer movement is active and the purple undersides are revealed when leaves fold at night.

History & Cultural Significance

Named in honor of Roberto Burle Marx (1909–1994), the visionary Brazilian landscape architect who integrated native Brazilian tropical plants into modernist garden design — a revolutionary act in mid-20th century landscape architecture. The species name honors his legacy of celebrating Brazilian native flora.

About Prayer Plants

The Marantaceae family, commonly known as prayer plants, represents one of the most visually striking groups of tropical understory herbs. Native to the humid forests of Central and South America, these plants exhibit nyctinastic movement — their leaves fold upward at dusk and open again at dawn, a response regulated by the pulvinus, a small joint-like thickening at the base of each leaf petiole. This daily rhythm is controlled by changes in turgor pressure in the pulvinus cells, responding to circadian light cues. Calathea (now largely reclassified as Goeppertia), Maranta, Stromanthe, and Ctenanthe form the major cultivated genera.

Botanical Profile

Family Marantaceae, genus Ctenanthe (about 15 species, all native to South America). Distinguished from Maranta by the unequal leaf base and from Goeppertia by typically larger size and differently structured flowers. Named after Roberto Burle Marx (1909–1994), the visionary Brazilian landscape architect who championed native Brazilian plants in garden design.

Growth Timeline

Moderate grower — 6–10 new leaves per year. Reaches mature size in 12–18 months.

Light Requirements

Medium indirect light — 1.5–2.5 m from an east or north window. The silver-grey coloration maintains in lower light better than colorful variegated Calatheas. Avoid direct sun which bleaches the silver surface.

Group Light Guide

Calathea, Maranta, and Stromanthe prefer medium to bright indirect light. Their dramatic leaf patterns fade in low light. Direct sun bleaches markings and causes leaf curl. North or east windows work well; filtered light through a sheer curtain on south windows is perfect.

Watering

Distilled or rain water when the top 2 cm of soil dry out. Moderately sensitive to fluoride — less than some Goeppertia species. Every 6–8 days in summer.

Group Watering Guide

Prayer plants need consistently moist soil — never allow them to dry out completely as this causes leaf curl and browning. Water when the top inch is dry, typically every 5–7 days. They are sensitive to fluoride in tap water; use filtered or rainwater if possible.

Humidity & Temperature

55–70% humidity preferred. Somewhat more tolerant of lower humidity than Goeppertia. Temperature 18–27°C, minimum 15°C.

Group Humidity & Temperature Guide

Calathea, Maranta, and Stromanthe are among the most humidity-demanding houseplants, requiring 60–80% RH for healthy foliage. Below 50% causes rapid browning of leaf margins, curling, and loss of the vibrant patterns these plants are known for. Temperature tolerance is narrow: 18–24°C is ideal; below 15°C triggers dormancy and leaf loss. These plants are extremely sensitive to temperature fluctuations — avoid placement near exterior doors, heaters, or draughty hallways. A pebble tray with water beneath the pot provides consistent local humidity. Bathroom windowsills with good light are ideal locations.

Soil & Potting

2 parts peat/coir, 1 part perlite. Repot every 1–2 years.

Group Soil Recipes

Prayer plants need moisture-retentive but well-draining soil: 50% potting mix, 20% perlite, 20% peat or coco coir, 10% orchid bark. They prefer slightly acidic pH of 5.5–6.0. Repot every 2 years or when roots emerge from drainage holes.

Fertilizing

Quarter-strength balanced liquid fertilizer monthly from March to September.

Group Fertilizing Guide

Prayer plants are sensitive to over-fertilization — use a balanced liquid feed (10-10-10) at quarter strength every 2–3 weeks during active growth. Excess fertilizer salts accumulate in their fine root system, causing leaf tip burn. Calathea and Maranta prefer organic-based feeds (fish emulsion, seaweed extract) which release nutrients gradually without salt buildup risk.

Propagation

Division at repotting in spring. Rooted sections with 3–4 leaves establish readily at 22–24°C with high humidity.

Group Propagation Guide

Prayer plants propagate best by division in spring. Unpot the mother plant, gently separate the rhizomatous root mass into sections with at least 3 stems each, and repot in fresh moisture-retentive mix. Keep divisions warm (21–24°C) and humid for 2–3 weeks. Stem cuttings also work: cut below a node, place in water or moist perlite, and roots appear in 2–4 weeks. Calathea can be divided when the mother plant has formed distinct crowns. Success rates are highest when divisions are taken from actively growing plants, not during winter dormancy.

Pruning & Maintenance

Trim brown tips. Remove yellowed leaves. Gentle leaf cleaning with a barely damp cloth.

Group Pruning Guide

Prayer plants rarely need pruning for shape. Remove spent flower stalks at the base — these divert energy from foliage production. Cut brown, crispy leaf edges with sharp scissors following the natural leaf contour, leaving a thin brown margin to avoid cutting into healthy tissue. Divide overgrown clumps in spring rather than pruning back — prayer plants respond better to division than hard cutting. Clean leaves gently with a soft damp cloth; avoid leaf shine products which clog stomata.

Common Problems

Brown tips: switch to distilled water. Yellow leaves: overwatering. Faded markings: light adjustment.

Troubleshooting Guide

Brown tips: distilled water. Yellow: overwatering. Pattern fading: light adjustment.

Pest & Disease Guide

Spider mites (primary threat in dry conditions), mealybugs. Weekly inspection. Maintain humidity as prevention.

Group Pest Profile

Spider mites are the most dangerous pest for prayer plants — the high humidity these plants require can paradoxically attract mites when humidity fluctuates. Check leaf undersides weekly with a magnifying glass for tiny dots and webbing. Mealybugs hide in the tightly rolled emerging leaves and leaf sheaths. Fungus gnats thrive in the constantly moist soil prayer plants prefer — use a layer of fine sand or diatomaceous earth on the soil surface. Scale insects are less common but persistent if established. Systemic insecticides in granular form added to soil provide long-term protection for recurring infestations.

Pet & Child Safety

NON-TOXIC — safe for cats and dogs.

Display & Styling

Excellent for terrariums, bathroom shelves, and mixed Marantaceae displays. The silver-grey tone provides cool contrast in warm-toned tropical arrangements.

Group Display Ideas

Display prayer plants at eye level where their leaf movement can be observed. They make excellent centerpieces on dining tables or coffee tables. Their patterns complement neutral interiors. Low terrariums work well for maintaining humidity around these moisture-loving plants.

Companion Planting Indoors

Groups with other Marantaceae. The silver tone pairs particularly well with Goeppertia ornata (white pinstripes on dark green) and Maranta leuconeura var. erythroneura (red veins).

Seasonal Care Calendar

Spring–Summer: active growth. Winter: reduce watering, cease fertilizing, maintain humidity.

Group Seasonal Guide

Spring: Increase watering as new growth emerges. Divide overcrowded clumps. Begin fertilizing with half-strength balanced feed. Summer: Maintain consistently moist soil and high humidity. Prayer plants grow actively and may need weekly feeding. Protect from direct sun which is stronger. Autumn: Reduce fertilizing to monthly. Watch for spider mites as indoor air dries. Leaf movements may be less pronounced. Winter: Keep soil barely moist, not wet. Stop fertilizing. Humidity management is critical — run humidifier near plant. Expect some leaf loss; this is normal dormancy behaviour.

Frequently Asked Questions

Quick Reference Summary

Related Plants

Goeppertia orbifolia

Calathea orbifolia

🙏 Prayer Plants

Goeppertia roseopicta 'Medallion'

Calathea Medallion

🙏 Prayer Plants

Goeppertia majestica 'White Fusion'

Calathea White Fusion

🙏 Prayer Plants

Goeppertia zebrina

Zebra Plant Calathea

🙏 Prayer Plants