The Scarlet Flame Caladium (Caladium hortulanum ‘Scarlet Flame’) is a captivating plant cherished for its striking foliage. This cultivar features vivid red, strap-shaped leaves often adorned with delicate pink and white speckles, all framed by a bright green margin. Its dynamic visual appeal makes it a popular choice for adding bold color and texture to various garden settings and indoor spaces. It is frequently used in patio planters, landscapes, borders, and as a vibrant houseplant.
Scarlet Flame Caladium Care
Light Needs
Scarlet Flame Caladiums thrive in bright, indirect light or partial to full shade. Direct sunlight can scorch their leaves, leading to brown or burnt patches. If leaves appear pale or washed out, or if holes with brown edges form, it indicates too much direct sun; move the plant to a shadier spot. Insufficient light can cause leggy growth and stunted leaf development.
Watering
Consistent moisture is important for Scarlet Flame Caladiums, as they do not tolerate dry conditions well. Keep the soil evenly moist but not waterlogged, which can lead to root rot. Allow the top inch or two of soil to dry out slightly between waterings, especially for potted plants. Containers should always have drainage holes to prevent soggy conditions.
Soil Requirements
Ideal soil for Scarlet Flame Caladiums is well-draining, rich in organic matter, and slightly acidic, with a pH generally between 5.5 and 6.5. A peat-based potting mix is suitable due to its high water-holding capacity. Incorporating amendments such as peat moss or compost can improve soil aeration and drainage.
Temperature and Humidity
These tropical plants thrive in warm temperatures, 65°F to 85°F (18°C-29°C) during the day, with nighttime temperatures above 60°F (15°C). Temperatures below 50-60°F can stunt growth or cause damage; wait until temperatures are consistently warm before planting outdoors. High humidity levels, at least 50%, are preferred for optimal growth. For indoor plants, increase humidity through misting, using a pebble tray, or placing the plant near a humidifier.
Fertilizing
Scarlet Flame Caladiums benefit from regular fertilization during their active growing season to support foliage development. A balanced liquid fertilizer (N-P-K ratio around 2-2-3 or 1-1-1), applied at ¼ to ½ strength every week or every other week, is suitable. Over-fertilization can burn leaves, especially white portions. Reduce or stop fertilizing as the plant prepares for dormancy.
Planting and Growing Tips
Bulb Planting
When planting Scarlet Flame Caladium tubers, place them with the pointed end upwards, 2 to 3 inches deep in the soil. This depth allows for proper root development from the top of the tuber. Spacing plants 8 to 10 inches apart allows for growth, with some recommendations for 10-14 inches apart. Plant when soil temperatures remain above 65°F (18°C), typically in late spring after the risk of cold snaps has passed.
Indoor vs. Outdoor Growing
Scarlet Flame Caladiums can be grown outdoors in garden beds and indoors in containers. For outdoor cultivation, especially in northern climates, containers are preferred because the soil warms faster and offers better drainage. When growing outdoors, select a protected, warm location. As houseplants, they thrive near a bright window, such as an east-facing one, where they receive ample indirect light.
Overwintering and Storage
In regions where temperatures drop below 60°F (15°C), Scarlet Flame Caladiums will enter dormancy. To preserve tubers for the following season, dig them up before the first frost or when soil temperatures fall below 55°F. After digging, remove most soil and allow tubers to dry for about a week in a warm, shady location.
Once dried, cut leaves from the tubers. Store cleaned tubers in a dry medium like sphagnum moss or a mesh bag. An ideal storage temperature is between 55°F and 65°F (13°C-18°C) to prevent damage or stunted growth. Tubers stored in containers can remain in their pots; allow the growing medium to dry out as leaves die back, and keep containers where temperatures do not fall below 55°F (13°C).
Addressing Common Issues
Yellowing leaves often indicate improper watering, either too much or too little, or a nutrient deficiency. Check soil moisture and adjust watering, ensuring drainage. If yellowing is due to nutrient deficiency, a balanced fertilizer application can help.
Brown leaf edges or scorched spots typically point to low humidity, excessive direct sunlight, or insufficient watering. Move the plant to a shadier spot, increase humidity with misting or pebble trays, and maintain consistent soil moisture. Pest problems, such as aphids, spider mites, or mealybugs, can occur, particularly on new growth. Regularly inspect plants and treat infestations with insecticidal soap.