How to Grow Red Caladium
Wikimedia Commons
Red Caladium
Caladium bicolor
flowerRed caladiums are tropical foliage plants prized for their striking heart-shaped leaves in brilliant shades of red, pink, and white. These shade-loving plants grow from underground tubers and are popular for adding vibrant color to indoor spaces and shaded garden beds. They thrive in warm, humid conditions and are relatively easy to grow with proper care.
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Example Red Caladium timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Caladium
Around Apr 17Near Pittsburgh's average last spring frost.
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Tend & protect
Late spring–summerWatering, feeding, and pest-watch reminders.
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First Red Caladium blooms
Around May 17≈ 30 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Red Caladium dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Zones 10-11 outdoors; grown as annuals or houseplants elsewhere
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Dormancy
November-March (3-5 months)Tubers are stored in cool, dry conditions with no visible growth
Store tubers at 60-65°F in peat moss or vermiculite. Keep dry to prevent rot. Check monthly for sprouting.
Sprouting
1-3 weeksEyes on the tuber begin to swell and small shoots emerge
Place tubers in warm (70-75°F), moist soil. Provide bright, indirect light. Keep soil warm and humid.
Leaf Development
3-6 weeksMultiple stems emerge with unfurling leaves that gradually expand and develop color
Maintain consistent warmth (75-85°F), humidity, and moisture. Begin light feeding with balanced fertilizer every 2 weeks. Increase light gradually.
Peak Foliage
6-10 weeks (continues through summer)Plant reaches full height with large, vibrant red leaves displaying distinctive vein patterns and possible white or pink veining
Maintain warm temperatures, humidity, and consistent moisture. Feed every 2 weeks with diluted balanced or foliage fertilizer. Remove any flower spikes to encourage leaf growth.
Senescence
4-8 weeks (September-November)Leaves begin to yellow and wilt as temperatures cool in fall and tubers prepare for dormancy
Gradually reduce watering as growth slows. Stop fertilizing. Allow foliage to die back naturally. When leaves are completely gone, store tubers in cool, dry location.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity, mist leaves regularly, use neem oil spray or insecticidal soap. Ensure good air circulation.
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Remove with rubbing alcohol on a cotton swab. Apply neem oil or insecticidal soap weekly until pest is gone.
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Scrape off manually with a soft brush. Apply horticultural oil or neem oil to affected areas.
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Ensure excellent drainage, allow soil to dry between waterings, use well-draining potting mix. Remove affected tubers and repot in fresh soil.
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Remove affected leaves. Improve air circulation. Avoid overhead watering. Apply fungicide if severe.
Uses
Interior Decorating & Shade Gardening
HouseholdRed caladiums add bold tropical color to indoor plant collections, offices, and shaded patios. Their heart-shaped red foliage brightens dim corners and creates dramatic visual interest in mixed container plantings. [source]
Edible Tubers (Traditional Use)
CulinaryIn tropical regions, caladium tubers have been eaten as a starchy vegetable after proper preparation to remove oxalates, though modern cultivation focuses primarily on ornamental use. [source]
Tropical Habitat Creation
WildlifeCaladiums attract humidity-loving insects and small creatures in tropical and subtropical gardens, creating lush microhabitats in shaded areas and contributing to a diverse garden ecosystem. [source]
Houseaplant Care & Propagation
HouseholdRed caladiums are excellent plants for learning tuber propagation and understanding tropical plant dormancy cycles, making them educational for gardeners interested in plant physiology. [source]
Pressed Leaf Art & Floral Design
CraftThe distinctive veined leaves can be pressed and preserved for decorative purposes, used in floral arrangements, or incorporated into botanical art and crafts. [source]
Harvest Tips
Caladiums are grown for foliage, not harvest. Remove individual yellowing leaves at the base of the petiole. Pinch off flower spikes to direct energy to leaf production. In fall, when foliage dies back completely, carefully dig tubers, allow to dry, clean gently, and store in cool, dry conditions for replanting next season.
Fun Facts
- 🌱 Red caladiums are native to tropical rainforests of South America and have been cultivated for centuries. They were sacred plants in pre-Columbian cultures and remain beloved in tropical gardens worldwide.
- 🌱 The vivid red coloration comes from pigments called anthocyanins, which protect the leaves from intense sunlight in their native shaded forest understory habitat. They actually develop more intense colors in lower light conditions.
- 🌱 Caladium tubers can live for many years and even increase in size annually if properly stored and cared for, with some tubers lasting decades or more with optimal dormancy storage practices.
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