Candlebush Cassia, also known as Candle Tree, Emperor's Candlesticks, Ringworm Bush, or Candlestick Senna, is one of the most spectacular flowering plants that can be grown as a houseplant. Its enormous tropical leaves and brilliant upright golden flower spikes create an unforgettable display that immediately becomes the focal point of any bright room, sunroom, or conservatory.
The plant earns its common name from its remarkable flower spikes, which emerge as bright yellow columns resembling glowing candles. Combined with lush tropical foliage, Candlebush creates the appearance of a miniature flowering tree indoors and offers a dramatic alternative to traditional houseplants.
Indoor Growing InformationCandlebush requires abundant light to thrive indoors. A bright south-facing window, sunroom, enclosed porch, or greenhouse-like environment is ideal. The more sunlight it receives, the more compact the growth and the heavier the flowering.
Keep the soil consistently moist but not waterlogged. During active growth, Candlebush appreciates regular watering and occasional feeding to support its rapid development and abundant blooms.
This is a vigorous grower and may reach 4 to 8 feet in height in large containers when provided with ideal conditions.
Container GrowingChoose a large container with excellent drainage. Rich, fertile potting soil encourages vigorous growth and flowering. As the plant matures, periodic pruning can help maintain a more compact and manageable indoor form.
Because of its rapid growth, Candlebush benefits from regular fertilization during the growing season.
Temperature and HumidityAs a tropical species, Candlebush prefers temperatures between 65°F and 90°F. Warm conditions encourage vigorous growth and flowering.
Moderate to high humidity is appreciated, although established plants often adapt surprisingly well to average household conditions when sufficient light is available.
FlowersThe extraordinary golden-yellow flower spikes are among the most distinctive blooms in the plant kingdom. Each spike consists of numerous bright yellow flowers arranged in dense upright columns that resemble decorative candles.
Flowering often occurs during warm weather and can continue for extended periods under favorable growing conditions.
Seed GerminationSeeds possess a hard seed coat and benefit from scarification before planting. Nick the seed coat lightly or soak seeds in warm water for 24 hours prior to sowing.
Plant seeds approximately ¼ inch deep in a warm seed-starting medium and maintain temperatures between 75°F and 85°F. Germination typically occurs within 1 to 3 weeks under warm conditions.
Houseplant UsesCandlebush belongs to the legume family and is native to tropical regions of Central and South America. The enormous compound leaves fold together at night and during cloudy weather, a fascinating characteristic shared with many members of the pea family.
The plant's scientific name has changed over time and is often listed as Senna alata in modern botanical references.
Historical NotesFor centuries, Candlebush has been cultivated throughout tropical regions for both ornamental and traditional medicinal purposes. Its common name "Ringworm Bush" comes from historical uses of the leaves in tropical folk medicine.
The spectacular flower spikes made it a favorite in Victorian conservatories, where exotic tropical plants were highly prized.
Growing TipProvide the brightest location possible. If indoor flowering is limited, supplemental grow lights can dramatically improve bloom production during winter months.
Seedman NoteCandlebush is not an ordinary houseplant—it is a living tropical spectacle. The combination of giant leaves and glowing golden flower spikes creates one of the most dramatic indoor displays available from seed.
Additional Seedman NoteFew plants in the entire Houseplant Collection can rival the visual impact of Candlebush Cassia. Visitors are often astonished to discover that the brilliant yellow "candles" are real flowers growing indoors. For gardeners seeking something truly extraordinary, Candlebush delivers a level of tropical beauty that is difficult to match.
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