How to Grow Camellia Showa Supreme
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Camellia Showa Supreme
Camellia japonica 'Showa Supreme'
shrubShowa Supreme is a stunning camellia cultivar prized for its large, semi-double to double flowers with deep red petals and prominent golden stamens. This evergreen shrub produces abundant blooms during the winter and early spring months, making it a showstopper in cooler-climate gardens. The glossy, dark green foliage provides year-round ornamental value.
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Example Camellia Showa Supreme timeline · Pittsburgh, PA (Zone 6b)
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Plant Camellia Showa Supreme
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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Harvest Camellia Showa Supreme
Late summer into fallBefore the first fall frost (≈ Nov 8)
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Growing Conditions
Soil
Growing Zones
Find your zone →Thrives in zones 8-10, with best performance in zones 8b-9b
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Get my Camellia Showa Supreme timeline →Growth Stages
Establishment
1-2 yearsYoung shrub developing root system with compact growth and minimal flowering
Water regularly, provide afternoon shade, mulch heavily, avoid pruning first year. Protect from harsh winds and extreme temperatures.
Vegetative Growth
2-3 yearsIncreasing foliage production and branch development; young shrub building structure
Light pruning to shape, maintain consistent moisture, apply balanced slow-release fertilizer in spring and after flowering
Flower Bud Formation
Summer to fall (June-October)Flower buds develop in summer and early fall along branch tips
Avoid over-pruning, maintain consistent watering, reduce nitrogen to encourage flowering, monitor for bud drop due to stress
Flowering
December-April (peak January-March)Large, showy semi-double to double red flowers with golden stamens bloom abundantly
Maintain consistent moisture (critical for bud retention), apply bloom-boosting fertilizer, deadhead spent flowers to encourage new blooms, protect from late frost
Post-Bloom
April-MayFlowers fade, seed pods may form, plant transitions to rest period
Remove spent blooms, prune lightly if needed, resume regular watering schedule, apply slow-release fertilizer
Companion Planting
Plan your garden →Plant with:
Avoid planting near:
Common Pests
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Spray with horticultural oil in late winter; prune heavily infested branches; encourage natural predators
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Increase humidity through regular misting; spray with neem oil or horticultural oil; avoid over-fertilizing with nitrogen
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Remove infected flowers immediately; clean up fallen petals and debris; apply fungicide in fall; avoid overhead watering
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Spray with strong water stream; apply insecticidal soap; use neem oil if severe
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Ensure excellent drainage; avoid waterlogging; apply fungicide drench if detected early; replant in well-draining soil
Uses
Cut flowers and floral arrangements
HouseholdThe large, showy double red blooms are highly prized for cut flower arrangements, wedding bouquets, and winter floral displays. The blooms last 2-3 weeks in cool water and maintain their vibrant color and full form. [source]
Winter and early spring garden color
OrnamentalAs a winter-blooming evergreen shrub, Showa Supreme provides rare deep red flowers when most gardens are dormant, extending the ornamental season and attracting winter-visiting wildlife. [source]
Pollinator and wildlife habitat
WildlifeThe abundant golden stamens attract bees and other pollinators during cooler months. The dense evergreen foliage provides shelter and nesting habitat for birds year-round. [source]
Decorative pressing and dried arrangements
CraftCamellia flowers can be pressed and dried for crafting, creating botanical art, or preserved in resin for jewelry and decorative projects while maintaining their elegant form and rich color. [source]
Camellia tea and culinary garnish
CulinaryWhile Showa Supreme is ornamental, camellia flowers are edible and used in specialty teas and as elegant garnishes for gourmet dishes in some cuisines. The petals have a subtle floral flavor. [source]
Harvest Tips
Camellia Showa Supreme is an ornamental shrub not harvested for food. Cut flowers by removing stem just below bloom base; harvest in early morning for maximum vase life (2-3 weeks in cool water). Flowers are prized for floral arrangements.
Fun Facts
- 🌱 Camellias were first cultivated in Japan over 1,000 years ago and are deeply embedded in Japanese culture; 'Showa' refers to the Japanese Showa era (1926-1989)
- 🌱 Camellia flowers are one of the few blooms that remain intact when they drop from the plant, falling as complete flowers rather than scattering petals, symbolizing a noble death in Japanese tradition
- 🌱 Camellia oil extracted from seeds has been used in East Asia for skincare and cooking for centuries, and modern research confirms its antioxidant and moisturizing properties
Gardening Terms
New to gardening? Learn about terms used in this guide:
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