Calathea

Calathea, Goeppertia,Prayer Plant, Peacock Plant, Zebra Plant, Pinstripe Calathea

Calatheas are tropical plants native to the rainforests of Central and South America. They are famous for their stunning, highly decorative foliage, which often features vibrant patterns of stripes, spots, and contrasting colors like green, pink, purple, and white. They are often called "Prayer Plants" because their leaves fold up at night and open during the day (a process called nyctinasty). While they can produce small, insignificant flowers, they are grown almost entirely for their dramatic foliage. Popular cultivated varieties include Calathea orbifolia, Calathea ornata, and Calathea makoyana.

Care Guide

LIGHT

  • Requires medium to bright, indirect light. They prefer the type of filtered light found under a dense tree canopy.
  • Avoid direct sunlight, which will quickly fade their vibrant leaf patterns and scorch the delicate leaves.
  • They can tolerate lower light, but growth will be slow, and colors may dull.

WATER

  • Needs consistent, even moisture. Never let the soil dry out completely.
  • Water when the top inch of soil is just dry to the touch.
  • Use distilled, filtered, or rainwater as they are extremely sensitive to chemicals (like chlorine) and mineral salts in tap water, which causes brown leaf tips.

SOIL

  • Needs a rich, well-draining, and moisture-retentive potting mix.
  • A blend of standard potting soil, perlite, and orchid bark or coco coir works well to prevent compaction while holding adequate moisture.

GROWTH HABIT

  • Ideal conditions: High humidity (60% or more is essential), consistent warmth (65-75F), and protection from cold drafts.
  • Growth rate & size: Growth rate is moderate during the growing season, forming dense, upright, or spreading clumps, usually 1-3 feet tall.

PROPAGATING

  • Propagated primarily by division of the rhizome (root ball) during repotting.
  • Gently separate sections of the plant that have a stem, leaves, and a portion of the root system attached.
  • Plant the divisions immediately into small pots with moist soil.

PRUNING

  • Pruning is minimal. Remove yellowed, damaged, or fully spent leaves by cutting the stem near the soil line.
  • Remove any spent flower stalks near the base.

REPOTTING

  • Repot when the plant is root-bound or when dividing, typically every 2-3 years.
  • Repot in the spring or early summer.
  • Use a pot that is only slightly larger than the current one to prevent overwatering.

FERTILIZING

  • Feed lightly during the spring and summer growing season (every 4-6 weeks).
  • Use a diluted, balanced liquid fertilizer (half strength or less).
  • Stop fertilizing during the fall and winter. Over-fertilizing can cause mineral burn on the sensitive leaves.

FLOWERING

  • While some species (like C. crocata) produce showy orange/yellow flowers, most popular houseplants have inconspicuous, small white or purple flowers near the soil line.
  • The focus is on the foliage, and flowering is not a guarantee indoors.

TOXICITY

  • Calatheas are generally considered non-toxic to humans and pets, making them a popular choice for homes with animals.

PRO TIPS

  • High humidity is mandatory; low humidity is the primary cause of brown, crispy leaf edges. Use a humidifier.
  • Avoid cold drafts and temperature fluctuations, as these can shock the plant and cause leaf curl.
  • If the leaves curl inward during the day, the plant is usually indicating insufficient moisture or too much light.

Variability in Care

Most varieties of this plant follow the standard care above, but some require adjustments.

Thick-Leaved/Textured Varieties

Examples: Calathea orbifolia, Calathea louisae (thick, durable leaves)

  • These varieties are slightly more tolerant of lower humidity than the thin-leaved types.
  • They benefit from slightly brighter indirect light to maintain their large, sturdy structure.
  • Their large leaves collect dust quickly and need regular wiping.

Thin-Leaved/Pinstripe Varieties

Examples: Calathea ornata (Pinstripe), Calathea setosa

  • These thin, delicate leaves are extremely sensitive to low humidity and tap water chemicals, often showing brown tips first.
  • Require consistent use of filtered or distilled water to maintain pristine leaf edges.
  • Can be more prone to spider mites than thicker-leaved types.

Flowering Varieties

Examples: Calathea crocata (Goeppertia crocata)

  • These varieties are grown specifically for their bright orange/yellow flower spikes.
  • Need slightly higher light levels than purely foliage types to set and maintain the flower buds.
  • Are often more prone to going dormant in winter after the flowering period is complete.

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