Silver Star Calathea (Calathea picturata 'Argentea')

Silver Star Calathea

Calathea picturata 'Argentea'

A striking prayer plant with silvery leaves edged in dark green, folding upward at dusk. Other names: Silver Prayer Plant.

Requires bright, indirect light; direct sunlight will scorch the leaves and fade the silver coloration.
1/week
Moderate
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Plant Needs

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Sunlight Requires bright, indirect light; direct sunlight will scorch the leaves and fade the silver coloration.
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Watering Keep the soil consistently moist but not waterlogged. High ambient humidity (60%+) is crucial.
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Temperature Prefers warm, stable temperatures and is highly sensitive to cold drafts.
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Characteristics

  • Leaves: Large, ovate to elliptic, featuring a striking silvery-white or pale green center surrounded by a broad, dark green margin. The undersides are a deep, vibrant burgundy or purple.
  • Stems: Short, clumping habit, with petioles emerging directly from underground rhizomes.
  • Flowers: Inconspicuous, small white or pale purple tubular flowers borne on short spikes, though rarely seen in indoor cultivation.
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Care Guide

Watering

Water thoroughly when the top inch of soil feels dry.

Fertilization

Apply a diluted balanced liquid fertilizer.. Pause fertilization during the autumn and winter dormancy period.

Aquarium Water:Use dirty aquarium water during regular water changes. It provides a gentle, organic source of nitrogen without the risk of salt buildup that causes leaf tip burn.
Pruning
  • Trim away any entirely yellow or brown leaves at the base of the stem using sterilized shears;
  • Snip off crispy brown edges with scissors, following the natural curve of the leaf to maintain aesthetics;
  • Wipe leaves regularly with a damp cloth to remove dust and support photosynthesis.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: Non-toxic to cats per ASPCA.

Humans: Considered non-toxic and safe for humans.

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Garden Uses & Culture

Culture: Popularized in Victorian Europe as a premium conservatory plant, prized for its ornate foliage that brought a touch of the exotic tropics to wealthy households.

Usage: Primarily used as an indoor ornamental foliage plant, excellent for terrariums, greenhouses, or as an understory plant in shaded tropical gardens.