How to Grow Streptocarpus Concord Blue
Streptocarpus Concord Blue
Streptocarpus × hybridus 'Concord Blue'
flowerStreptocarpus 'Concord Blue' is a hybrid Cape primrose featuring striking deep blue-purple flowers with darker vein markings and yellow-throated centers. This compact herbaceous perennial produces rosettes of soft, fuzzy green leaves and blooms prolifically when given proper care. It is primarily grown as a tender houseplant in temperate climates.
Growing Conditions
Soil
Growing Zones
Find your zone →Thrives outdoors year-round in zones 10b-11; grown as a houseplant elsewhere
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Growth Stages
Seed Germination
10-14 daysTiny seeds germinate on moist soil surface with light exposure; first cotyledons emerge in 10-14 days
Maintain 65-75°F temperature; provide consistent moisture and bright indirect light; use bottom heat (65-70°F) to encourage germination; keep soil surface moist with misting or humidity dome
Seedling & Establishment
4-6 weeksTrue leaves develop; seedlings form small rosettes; roots establish in growing medium
Maintain high humidity (60-70%); provide bright indirect light 12+ hours daily; avoid wetting fuzzy leaves; keep soil consistently moist; provide good air circulation to prevent damping-off
Vegetative Growth
8-12 weeksPlant expands its rosette of elongated, soft, fuzzy green leaves; increases in size and leaf production
Provide bright indirect light; maintain warm temperatures (65-75°F); feed with dilute, balanced liquid fertilizer every 2 weeks; ensure good drainage and air circulation; avoid leaf crowding
Flowering
6-8+ weeks (can rebloom with proper care)Flower buds emerge from leaf axils; distinctive deep blue-purple flowers with yellow throats bloom sequentially; multiple flower stems may be present
Maintain bright light (prevent flowering slowing); continue feeding with balanced or bloom-boosting fertilizer; provide consistent moisture without waterlogging; remove spent flowers to encourage continuous blooming; maintain 60-72°F nights for best color
Mature & Maintenance
Indefinite with proper careEstablished plant maintains rosette form, produces flowers continuously or seasonally; may develop multiple growth points
Prune out dead leaves and spent flower stems; refresh soil annually or as needed; divide crowded plants in spring; reduce watering slightly in winter; maintain humidity and bright indirect light year-round
Common Pests
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Remove with damp cloth or cotton swab dipped in rubbing alcohol; spray with insecticidal soap; isolate affected plants; repeat treatment every 7-10 days as needed
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Use yellow sticky traps; spray undersides of leaves with neem oil or insecticidal soap; improve air circulation; reduce overwatering
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Increase humidity to 60%+; spray with water or neem oil; use insecticidal soap; ensure adequate air circulation; discard severely infested plants
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Allow soil surface to dry slightly between waterings; use yellow sticky traps; apply sand layer over soil; improve drainage; use bottom watering
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Improve air circulation; avoid wetting foliage; reduce humidity slightly; remove affected plant parts; discard severely infected plants; apply sulfur dust or fungicide if severe
Uses
Indoor ornamental houseplant
HouseholdStreptocarpus 'Concord Blue' is an ideal houseplant for bright windowsills, bathrooms, and humid indoor environments, adding vibrant blue-purple color to living spaces. [source]
Terrarium & controlled environment decoration
HouseholdIts preference for high humidity and compact growth makes it well-suited for terrariums, plant cabinets, and under fluorescent grow lights where a humid microclimate is maintained. [source]
Pollinator-friendly indoor plant
WildlifeThe tubular flowers attract pollinators including small insects and hummingbirds in outdoor growing zones, supporting local ecosystem health. [source]
Breeding & hybridization material
CraftStreptocarpus cultivars like 'Concord Blue' are actively bred and hybridized by plant enthusiasts and commercial growers to develop new colors and improved traits. [source]
Ethnobotanical interest
MedicinalWhile not commonly used medicinally, wild Streptocarpus species have been traditionally used in African indigenous medicine; modern Streptocarpus hybrids are valued for their ornamental properties and horticultural significance. [source]
This is not medical advice. LizPlants is not a medical resource. Always consult a qualified healthcare professional before using plants medicinally.
Harvest Tips
This is an ornamental flower plant; no harvest per se. Deadhead spent blooms by gently pinching off flower stems to encourage continuous flowering. Cut flower stems are short-lived in arrangements but can be enjoyed indoors for 3-5 days. For seed collection, allow a few flowers to go unpruned; seed pods will develop over 4-6 weeks and can be collected when dry and papery.
Fun Facts
- 🌱 The name 'Streptocarpus' derives from Greek words meaning 'twisted fruit,' referring to the characteristic coiled seed pods that spiral as they dry.
- 🌱 Cape primroses are not true primroses but belong to the Gesneriaceae family, which also includes African violets, gloxinias, and episcias—making them relatives of many popular houseplants.
- 🌱 Some Streptocarpus species can produce flowers for 8-12 months continuously under ideal conditions with bright light and consistent care, earning them the nickname 'perpetual bloomers.'
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