The Calathea pinstripe, also known as Calathea ornata, is a captivating houseplant. Its dark green leaves feature delicate pink lines, resembling a pinstripe pattern. As a member of the Marantaceae family, it’s often called a “prayer plant” because its leaves fold upwards at night and unfurl with the morning light.
Calathea Pinstripe Care Essentials
Lighting
Calathea pinstripe thrives in bright, indirect light. Direct sunlight can harm its delicate leaves, causing the vibrant pinstripes to fade or leading to scorched spots. Place the plant near an east or north-facing window, or use sheer curtains to diffuse light from south or west-facing windows.
Watering
Consistent soil moisture is important for the Calathea pinstripe, which is sensitive to both over and under-watering. The soil should remain consistently moist but never waterlogged to prevent root rot. Water when the top inch or two of the soil feels dry. Use filtered, distilled, or rainwater, as Calatheas are sensitive to chemicals like chlorine and fluoride found in tap water.
Humidity
High humidity is a requirement for the Calathea pinstripe. An ideal range is between 50% and 80%, with levels above 60% being beneficial. Methods to increase humidity include using a humidifier, placing the plant on a pebble tray, or grouping it with other plants.
Soil Requirements
The Calathea pinstripe thrives in a well-draining, moisture-retentive potting mix. A peat-based mix is often recommended, with added perlite, vermiculite, or orchid bark to enhance drainage and aeration. The soil should be slightly acidic to neutral, with a pH between 5.5 and 7.0.
Temperature
Consistent warm temperatures are important for the Calathea pinstripe, which prefers a range between 65°F (18°C) and 85°F (29°C). It is sensitive to sudden temperature fluctuations and cold drafts. Avoid placing the plant near open windows, doors, air conditioning vents, or heating sources.
Fertilizing
During its active growing season in spring and summer, the Calathea pinstripe benefits from regular fertilization. A balanced liquid houseplant fertilizer, diluted to half the recommended strength, is suitable. Fertilize about once a month, reducing or stopping entirely during fall and winter when growth slows. Over-fertilizing can lead to root burn.
Troubleshooting Common Calathea Pinstripe Problems
Browning Leaf Tips or Edges
Browning leaf tips or edges commonly indicate low humidity, water quality issues, or inconsistent watering. Dry air causes the plant to lose moisture, leading to crispy brown margins. The presence of minerals in tap water can also accumulate in the soil and cause browning. Ensure consistent soil moisture and use filtered or distilled water to alleviate this problem.
Curling Leaves
Curling leaves often signal stress from underwatering, low humidity, or temperature extremes. When the soil dries out or the air is excessively dry, leaves curl inward to conserve moisture. Exposure to cold drafts or significant temperature drops can also cause curling. Addressing watering consistency and humidity levels usually resolves this issue.
Fading Leaf Color
If the distinctive pinstripes and leaf color begin to fade, it often signals too much direct light exposure. Direct sunlight can bleach the vibrant patterns. Moving the plant to a location with bright, indirect light will help restore its rich coloration. Nutrient deficiencies can also contribute to faded or yellowing leaves.
Pest Infestations
Calathea pinstripe plants can be susceptible to common houseplant pests, especially spider mites, which prefer dry conditions. Signs of spider mites include tiny webbing and yellowing or dry spots on leaves. Mealybugs and fungus gnats can also affect Calatheas. Increasing humidity helps deter spider mites, and washing leaves with water or using insecticidal soap can manage infestations.
Repotting and General Maintenance
Repotting a Calathea pinstripe is typically needed every two to three years, or when the plant becomes root-bound, indicated by roots emerging from drainage holes or the soil surface. Spring, during the active growth phase, is the best time for repotting. Select a pot only slightly larger than the current one and use fresh, well-draining potting mix.
General maintenance tasks also contribute to the plant’s health and appearance. Regularly wipe down leaves with a soft, damp cloth to remove dust buildup and inspect for pests or health issues. Remove any yellow or brown leaves at their base to encourage new growth and maintain a tidy appearance.