How to Grow Red Begonia Scarlet Emperor
Red Begonia Scarlet Emperor
Begonia × semperflorens-cultorum 'Scarlet Emperor'
flowerScarlet Emperor is a vibrant wax begonia cultivar prized for its brilliant red flowers and glossy, dark green foliage. This tender perennial is grown as an annual in most climates and produces continuous blooms from spring through frost. It's an excellent choice for bedding, containers, and shaded gardens.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 10-11; grown as annual elsewhere or overwintered indoors
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Growth Stages
Seedling
3-4 weeksTiny plants with 2-4 true leaves, very delicate and slow-growing initially.
Keep under bright grow lights for 14-16 hours daily. Maintain high humidity with a dome or plastic cover. Do not allow soil to dry out. Begin gentle air circulation after germination to prevent damping-off.
Vegetative Growth
3-4 weeksPlant develops multiple sets of true leaves and begins branching. Compact, bushy growth with dark green foliage.
Pinch seedlings when 2-3 inches tall to encourage branching. Maintain consistent moisture and humidity. Begin fertilizing with diluted liquid fertilizer every 2 weeks once true leaves appear.
Bud Formation & First Blooms
2-3 weeksFlower buds appear at branch tips; first bright scarlet blooms emerge.
Maintain regular watering and humidity. Begin full-strength fertilizing on a weekly or bi-weekly schedule. Ensure adequate light (bright, indirect). Remove any damaged or yellowing lower leaves.
Flowering & Blooming
Summer through fall frost (12-16+ weeks)Continuous production of scarlet flowers with glossy dark green foliage. Plant reaches mature size.
Deadhead spent flowers only if desired for aesthetics (not necessary for re-blooming). Water consistently. Fertilize every 7-14 days with balanced or slightly higher-phosphorus formula to encourage blooming. Watch for spider mites and powdery mildew in dry conditions.
Decline & Overwintering (Optional)
Fall/winter dormancy (varies)Plants slow growth as temperatures cool and days shorten. Foliage may yellow; flowering declines.
In zones below 10, dig plants before frost and pot them indoors. Reduce watering and fertilizing. Provide bright indirect light and cool temperatures (60-65°F). Prune back in late winter to rejuvenate for spring.
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Increase humidity and air circulation; spray with water to dislodge. Use neem oil or miticide if severe. Isolate infested plants.
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Improve air circulation and reduce humidity slightly. Spray with sulfur dust or potassium bicarbonate. Remove affected leaves. Avoid wetting foliage.
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Use yellow sticky traps. Spray with insecticidal soap or neem oil. Isolate affected plants.
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Improve air circulation and reduce excess humidity. Remove affected leaves promptly. Avoid overhead watering. Apply fungicide if severe.
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Dab with alcohol-soaked cotton swab for small infestations. Spray with neem oil or insecticidal soap for larger infestations.
Uses
Edible Flowers
CulinaryBegonia flowers are edible with a slightly tart, citrusy flavor and are used as colorful garnishes in salads and desserts. They add visual appeal and a delicate tang to fresh dishes. [source]
Ornamental Bedding & Container Gardens
HouseholdScarlet Emperor is widely used in shade gardens, borders, containers, and hanging baskets for continuous season-long color. Its compact habit and bright red blooms make it a popular choice for mixed plantings. [source]
Traditional Herbal Use
MedicinalSome cultures use begonia leaves and flowers in traditional medicine for their mild astringent and diuretic properties, though scientific evidence is limited. Often prepared as a gentle tea. [source]
Cut Flowers & Arrangements
CraftThe scarlet blooms are attractive in fresh flower arrangements and last several days in water. Dark foliage makes an excellent background for mixed bouquets. [source]
Pollinator Support
WildlifeBegonia flowers attract bees and other pollinators, providing nectar and pollen especially valuable in shaded gardens where flowers are scarce. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
Begonias are ornamental flowers; deadhead (pinch off) spent blooms to encourage continued flowering, though this plant reblooms readily without it. Cut stems for fresh arrangements when desired. For overwintering, dig plants carefully before hard frost with roots intact.
Fun Facts
- 🌱 Wax begonias like Scarlet Emperor are called 'wax' begonias because their leaves have a glossy, waxy coating that helps them retain moisture and gives them a jewel-like appearance.
- 🌱 Begonias are native to tropical and subtropical regions and have been cultivated for centuries; they were first hybridized in Europe in the 19th century, leading to the development of many colorful bedding varieties.
- 🌱 Scarlet Emperor and similar semperflorens begonias can technically live for several years in frost-free climates or indoors, making them long-lived perennials despite being grown as annuals in temperate zones.
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