The Calathea burle-marxii, commonly known as Burle Marx Calathea or Fishbone Prayer Plant, is a captivating tropical plant. Originating from the humid undergrowth of South America, it thrives in shaded, moist environments. Its distinctive appearance, with elongated, ribbed leaves featuring a prominent fishbone-like pattern of darker green veins against a lighter green background, makes it a popular indoor houseplant. The striking foliage and its unique ability to fold its leaves upwards at night, resembling praying hands, enhance its ornamental appeal.
Burle Marx Calathea Care
Light
The Burle Marx Calathea flourishes in bright, indirect light conditions, mimicking its natural habitat beneath a dense canopy. Placing the plant several feet away from a south or west-facing window, or near an east-facing window, provides optimal illumination. Direct sunlight can cause the delicate leaves to scorch, resulting in brown, crispy patches and a faded appearance. Insufficient light may lead to slower growth and less vibrant leaf coloration.
Water
Maintaining consistent soil moisture is important for the Burle Marx Calathea, but avoid waterlogging. Water thoroughly when the top inch or two of soil feels dry. This plant is sensitive to chemicals in tap water, like chlorine and fluoride, which can cause leaf tip burn. Using filtered, distilled, or rainwater prevents these issues. Ensure proper drainage to prevent root rot from standing water in the saucer. Watering in the morning allows any excess moisture on the leaves to evaporate throughout the day.
Humidity
High humidity is important for the Burle Marx Calathea, reflecting its tropical origins. Levels between 60% and 80% prevent crispy leaf edges. Grouping humidity-loving plants together creates a localized microclimate with elevated moisture. Placing the plant on a pebble tray filled with water, ensuring the pot does not sit directly in the water, also increases ambient humidity. A humidifier near the plant effectively provides consistent moisture, as regular misting offers only a temporary boost and does not provide sufficient long-term humidity.
Soil
A well-draining yet moisture-retentive soil mix is ideal for the Burle Marx Calathea. A good blend includes components like peat moss, perlite, and pine bark, providing aeration and water retention, and the soil should be slightly acidic, with a pH range between 6.0 and 7.0. Rich organic matter supports the plant’s nutritional needs, mimicking its natural forest floor environment. Using a high-quality potting mix formulated for aroids or tropical plants provides the necessary structure and nutrients. Ensure adequate drainage holes in the pot.
Temperature
The Burle Marx Calathea thrives in warm, stable temperatures, ideally between 65°F and 80°F (18°C and 27°C). Protect the plant from sudden temperature fluctuations and cold drafts, which can stress it and lead to leaf damage. Position the plant away from air conditioning vents, heating units, or drafty windows to maintain a consistent environment. Temperatures below 60°F (15°C) can cause the plant to suffer, potentially leading to stunted growth or yellowing leaves.
Fertilizer
During the active growing season (spring and summer), the Burle Marx Calathea benefits from regular, diluted fertilization. Apply a balanced liquid fertilizer, diluted to half or quarter strength, every two to four weeks. Reduce or cease fertilization during the cooler, dormant months of fall and winter. Over-fertilization can lead to salt buildup in the soil, causing root burn and leaf damage. Flush the soil with distilled water every few months to prevent salt accumulation.
Repotting Your Burle Marx Calathea
Repot a Burle Marx Calathea when it shows signs of outgrowing its container, such as roots emerging from drainage holes, appearing top-heavy, or a slowdown in growth. The ideal time is during spring or early summer, coinciding with its active growth period, allowing for quicker recovery. Select a new pot only one size larger to prevent overwatering. Carefully remove the plant, gently loosening compacted roots, then place a layer of fresh, well-draining soil mix at the bottom of the new pot, position the plant, and fill around the root ball, ensuring the same depth. After repotting, water thoroughly and return it to its regular care routine, providing consistent humidity to aid recovery.
Propagating Burle Marx Calathea
The most effective propagation method for Burle Marx Calathea is division, typically performed during repotting. This involves carefully separating the rhizomes (underground stems) into smaller sections. Each section must have at least one healthy leaf and a portion of its own root system for successful establishment. Divide the plant during its active growing season, such as spring, to enhance success.
Gently remove the plant from its pot, untangle the root ball, and identify natural divisions within the rhizome mass. Use a clean, sharp knife or your hands to separate these sections, ensuring each new plant has sufficient roots and foliage. Plant each division into its own small pot with fresh, well-draining soil mix. Provide consistent warmth and high humidity to encourage new root growth and establishment.
Common Issues and Solutions
Crispy or Browning Leaf Edges
Crispy or browning leaf edges often indicate insufficient humidity or inconsistent watering. Increase ambient humidity with a humidifier or pebble tray, and maintain a regular watering schedule with filtered water.
Yellowing Leaves
Yellowing leaves suggest overwatering, leading to root rot, or a nutrient deficiency. Allow the topsoil to dry slightly between waterings and ensure proper drainage to prevent root rot.
Drooping Leaves
Drooping leaves indicate underwatering. A thorough watering can quickly revive the plant. If drooping persists, it may indicate root issues, potentially from overwatering.
Pest Infestations
Pest infestations, such as spider mites or mealybugs, can affect Burle Marx Calatheas. Inspect leaves regularly and treat with insecticidal soap or neem oil to manage these pests.
Loss of Leaf Vibrancy
Loss of leaf vibrancy, where distinct patterns fade, points to too much direct light. Move the plant to a location with bright, indirect light to restore its color.