Caladium ‘Poison Dart Frog’ is a visually striking plant that captivates gardeners with its vibrant foliage. Its unique coloration and distinctive patterns make it a popular choice for adding a touch of the tropics to various settings.
Understanding Caladium ‘Poison Dart Frog’
Caladium ‘Poison Dart Frog’ is a specific cultivar developed by Brian Paul Williams in 2012. This herbaceous perennial typically grows 30 to 60 centimeters tall with an upright, compact habit. Its heart-shaped leaves are deep dark green, overlaid with large reddish-pink blotches and sometimes small white spots. A reflective sheen on its leaves, more apparent in brighter light, contributes to its namesake resemblance to a painted dart frog.
Cultivating Caladium ‘Poison Dart Frog’
Light
Caladium ‘Poison Dart Frog’ thrives in bright, indirect light, with 40% to 60% shade being ideal. While it tolerates some full sun for enhanced leaf color, excessive light may bleach leaves or cause necrotic margins. Insufficient light can lead to stretched petioles and weaker leaves.
Watering
Maintain consistent soil moisture for Caladium ‘Poison Dart Frog’. Keep the soil moist but not waterlogged, as tubers are sensitive to excessive moisture and can develop root rot. Water when the top 5 centimeters of potting mix feels dry. During dormancy in cooler months, reduce or cease watering until new growth emerges.
Soil and Potting
This caladium thrives in a well-draining potting mix rich in organic matter, such as peat. This composition ensures good water retention while allowing for adequate drainage. The soil pH should range between 5.5 and 6.5. When potting, plant tubers 5 to 7.5 centimeters deep, as roots develop from the upper side.
Temperature and Humidity
Caladium ‘Poison Dart Frog’ prefers warm conditions, with daytime temperatures from 21°C to 32°C and nighttime temperatures no lower than 18°C. Temperatures consistently below 15°C can cause damage, leading to stunted growth or discolored leaves. High humidity, above 50%, is beneficial. To increase humidity, group plants, place pots on a pebble tray, or use a small humidifier.
Fertilization
During its active growing season, Caladium ‘Poison Dart Frog’ benefits from regular fertilization. It is sensitive to nitrogen, so a balanced fertilizer with a 2-2-3 or 1-1-1 N-P-K ratio is recommended. Avoid over-fertilization, which can lead to stretched petioles or poor leaf coloration. Liquid fertilizers applied fortnightly during the warm growing period are effective.
Addressing Common Issues
While generally resistant to pests and diseases, Caladium ‘Poison Dart Frog’ can face some issues. Pests that may occasionally affect the plant include:
Aphids
Thrips
Mealy bugs
Two-spotted spider mites
Whiteflies
Signs of low humidity include crisping leaf edges, which increasing moisture can mitigate. Overwatering is a frequent problem, leading to root rot or fungal issues like yellowing or browning leaves. Ensure proper soil drainage and allow the topsoil to dry between waterings to prevent moisture-related problems.
Propagation Methods
Propagation of Caladium ‘Poison Dart Frog’ is achieved through tuber division. This process is performed in spring before the new growth cycle. Carefully unearth tubers and divide them into sections, ensuring each piece has at least one “eye” or growth point. After cutting, allow surfaces to dry and form a protective callous for a few days before planting, which helps prevent rot and disease. Plant the tuber pieces in suitable potting mix.
Toxicity Concerns
Despite its name, Caladium ‘Poison Dart Frog’ is not related to the actual poison dart frog amphibian. However, the plant contains insoluble calcium oxalate crystals, making it toxic if ingested. These crystals cause immediate irritation upon contact with mucous membranes. Symptoms of ingestion in humans and pets include:
Oral pain
Swelling of the mouth, tongue, and lips
Excessive drooling
Vomiting
Keep the plant out of reach of children and pets. Wear gloves when handling to avoid skin irritation.