How to Grow Red Crossandra
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Red Crossandra
Crossandra infundibuliformis 'Red'
flowerRed Crossandra is a tropical evergreen shrub prized for its vibrant red-orange tubular flowers that bloom in dense, tiered spikes. Native to India and Sri Lanka, this compact ornamental produces continuous flowers throughout warm seasons when given proper care. The glossy, deep green foliage provides an attractive backdrop to the prolific blooms.
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Example Red Crossandra timeline · Pittsburgh, PA (Zone 6b)
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Plant Red Crossandra
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 Crossandra blooms
Around Jun 1≈ 45 days after planting
Sample dates for Pittsburgh, PA. Sign up to get exact Red Crossandra dates for your own zip code.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 10-11; grown as houseplant or annual in cooler climates
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Seedling
2-3 weeksTiny seedlings emerge with first true leaves appearing within 7-14 days; plants are delicate with minimal foliar growth
Maintain high humidity (75-85%) and warm temperatures (70-75°F). Use grow lights if indoors. Water gently to keep soil moist. Avoid transplanting until 2-3 true leaves develop
Establishment
3-4 weeksYoung plants develop multiple sets of leaves and begin forming branching structure; root system expands
Gradually acclimate to normal humidity. Maintain consistent warmth (65-75°F minimum). Pinch growing tips once plants reach 3-4 inches to encourage bushiness. Begin light fertilizing every 2-3 weeks
Vegetative Growth
4-6 weeksPlant develops full foliage and compact bushy shape with increasingly vigorous stem growth and glossy dark green leaves
Maintain bright light and consistent moisture. Fertilize every 2 weeks with balanced, diluted fertilizer. Continue pinching branch tips to shape plant and encourage denser growth. Ensure warm temperatures (70°F+)
Flowering
8-12 weeks (continuous with proper care)Tiered spikes of tubular red-orange flowers emerge from terminal growth points; flowers open sequentially up the spike
Maintain high humidity (50%+) as dry air causes buds to drop. Keep soil consistently moist. Switch to bloom-promoting fertilizer (lower nitrogen, higher phosphorus). Provide bright light. Remove spent flower spikes to encourage reblooming
Mature/Maintenance
Ongoing (years)Established plants flower reliably with proper care; may reach 2-3 feet tall and wide; perennial in warm climates
Deadhead spent flowers regularly. Prune lightly in spring to maintain shape. Reduce watering in cooler months. Annual pruning rejuvenates older plants. Watch for common houseplant pests
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with insecticidal soap or neem oil every 7-10 days; increase air circulation; yellow sticky traps
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Increase humidity through regular misting; spray with water to dislodge; use miticide or neem oil if severe
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Remove with cotton swab dipped in rubbing alcohol; spray with insecticidal soap; isolate infested plant
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Scrape off manually; treat with horticultural oil or insecticidal soap; monitor regularly
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Improve humidity; use blue sticky traps; spray with neem oil or insecticidal soap
Uses
Tropical Garden Accent
OrnamentalRed Crossandra's vibrant red-orange flowers and compact evergreen form make it an excellent choice for tropical gardens, mixed borders, and container gardens. The continuous blooms provide reliable color in warm, humid climates. [source]
Indoor Houseplant
HouseholdThrives as an indoor decorative plant in bright locations with high humidity, making it ideal for greenhouses, humid bathrooms, or under grow lights. Provides year-round color in controlled indoor environments. [source]
Pollinator Attraction
WildlifeThe tubular red-orange flowers attract hummingbirds and nectar-feeding insects, making it valuable in pollinator gardens in warm zones. Provides a sustained food source throughout the flowering season. [source]
Cut Flower Arrangements
CraftThe distinctive tiered flower spikes make excellent long-lasting cut flowers for tropical-themed floral arrangements and bouquets. Flowers last 1-2 weeks in water once fully opened. [source]
Harvest Tips
This is an ornamental plant grown for flowers rather than harvest. Deadhead spent flower spikes regularly by pinching off below the dead flowers to encourage continuous blooming and maintain plant shape. Cut back leggy stems in spring to rejuvenate. In frost-prone areas, bring potted plants indoors before first frost
Fun Facts
- 🌱 The name 'Crossandra' comes from Greek words meaning 'fringe' and 'man,' referring to the fringed anthers of the flower's stamens
- 🌱 Red Crossandra flowers open in a sequential pattern from bottom to top along the flower spike, with individual flowers lasting several days
- 🌱 This plant is widely cultivated in India and Sri Lanka as a traditional garden ornamental and is known locally as 'Aboli' or 'Kanakambaram'
Gardening Terms
New to gardening? Learn about terms used in this guide:
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