Caladium Candidum Jr. is a tuberous perennial known for its distinctive foliage. This compact variety features striking, pure white, heart-shaped leaves with prominent dark green veins. Growing to 10-14 inches tall and wide, its smaller stature makes it a popular choice for groundcover or as an accent in containers. The white leaves brighten shaded areas. While it produces inconspicuous, calla-type flowers in summer, these are typically hidden by the showy leaves.
Caring for Caladium Candidum Jr.
Light
Caladium Candidum Jr. thrives in bright, indirect light. Partial to full shade is ideal, as direct sun exposure can lead to leaf scorch and fading of its white coloration. Indoors, an east or north-facing window provides suitable light. Outdoor plants benefit from morning sun followed by afternoon shade. Too little light might cause leaves to appear less white and more green.
Watering
Maintaining consistent soil moisture is important for Caladium Candidum Jr., but avoid waterlogging. Keep the soil evenly moist, watering thoroughly when the top inch feels dry. Overwatering can lead to root rot and yellowing leaves; insufficient water causes wilting and browning leaf edges. Container-grown plants may require more frequent watering due to quicker soil drying.
Soil
A well-draining soil mix rich in organic matter is optimal for Caladium Candidum Jr. This plant prefers a slightly acidic to neutral pH, ideally between 5.5 and 6.5. Good drainage prevents waterlogging around tubers, which can cause rot. Incorporating materials like coco peat, perlite, or vermicompost improves aeration and drainage.
Temperature and Humidity
Caladium Candidum Jr. flourishes in warm and humid conditions. Daytime temperatures between 70-75°F (21-24°C) and nighttime temperatures above 60°F (15°C) promote vigorous growth. Temperatures below 50°F (10°C) can inhibit growth and damage the plant. High humidity, ideally 50-70%, benefits healthy foliage. To increase humidity, group plants, place pots on pebble trays filled with water, or use a room humidifier.
Fertilization
During its active growing season in spring and summer, Caladium Candidum Jr. benefits from regular fertilization. Apply a balanced liquid fertilizer every two to four weeks for strong foliage development. Wait about a month after new leaves emerge before fertilizing. As the plant approaches dormancy in late summer or early autumn, reduce and then cease feeding entirely. Avoid fertilizers with excessive nitrogen, as this can negatively impact white-leaf cultivars.
Planting and Dormancy
Plant Caladium Candidum Jr. bulbs in spring, after the last frost, when air temperatures consistently exceed 60°F (15°C) and soil temperatures reach at least 65°F (18°C). For outdoor planting, place bulbs 1.5 to 2 inches deep with growth points facing upwards. Space multiple bulbs 8-12 inches apart for adequate growth and air circulation. For indoor cultivation, select a pot with drainage holes and a suitable potting mix.
Caladiums naturally enter dormancy as temperatures cool and daylight hours shorten. During this phase, leaves yellow and die back, signaling the plant is resting. In USDA Hardiness Zones 9-11, tubers can remain in the ground over winter. For colder climates, dig up tubers before the first frost. After digging, clean them, dry for several days in a warm, shaded area, and store in a cool (50-60°F or 10-15°C), dry, dark place, often in peat moss or vermiculite, until replanting in spring.
Common Problems and Solutions
Caladium Candidum Jr. plants are generally robust, but issues can arise from environmental factors or pests. Leaf scorch, appearing as brown or crispy edges, often results from too much direct sunlight, insufficient humidity, or over-fertilization. Move the plant to a shadier location, increase humidity, and ensure proper fertilization to resolve this. Yellowing leaves can indicate overwatering, poor drainage, or a lack of nutrients. Adjust watering practices to allow the topsoil to dry and check for proper drainage.
Pests like spider mites, aphids, thrips, and mealybugs can infest caladiums, causing distorted growth or discolored leaves. Regular inspection, especially on the undersides of leaves, helps early detection. Minor infestations can be managed with organic solutions such as insecticidal soap or neem oil. Root rot is a common disease, primarily caused by excessive watering and inadequate soil drainage. Ensure well-draining soil and containers with drainage holes for prevention. Stunted growth or smaller leaves might be due to cold temperatures or a container that is too small, restricting root development.