AxilDB — Botanical Accession System

Streptocarpus ionanthus 'Cajun's Dark Shadows' husbandry

Keep evenly moist; never soggy.Bright indirect light; avoid hot sun.Usually low-risk, but keep away from pets/children.

Inherited from Streptocarpus ionanthus 'Black Magic (Lyon's)'

Water: Keep evenly moist; never soggy.
Light: Bright indirect light; avoid hot sun.
Toxicity: Usually low-risk, but keep away from pets/children.
Care notes: Warm, humid indoor plant; use airy, fast-draining mix, careful bottom or wick watering, light regular feeding, and remove spent blooms/leaves.

Cadence: Water when the top 1–2 cm of mix just begins to dry; often every 5–10 days indoors.
Moisture level: Consistently lightly moist, not wet.
Drought tolerance: Low; wilts quickly if allowed to dry hard.
Wet/dry cycle notes: Use room-temperature water; avoid wetting the crown and leaf center.
Seasonal adjustments: Water less often in cool/dim winter conditions; slightly more in active spring growth.

Intensity: Bright, filtered indirect light; east window or shaded south/west.
Duration: About 10–14 hours of gentle light daily.

USDA zone: Typically grown indoors; not frost-hardy outdoors.
Cold tolerance: Sensitive below about 13 C.
Heat tolerance: Moderate; growth slows above about 27 C.
Frost sensitivity: Very frost sensitive.
Overwinter instructions: Keep indoors at stable warmth, away from cold glass and drafts.

Range: About 40–60% relative humidity.
Dry air tolerance: Low to moderate; dry air reduces bloom quality.
Misting notes: Avoid misting the foliage; use a humid tray or room humidifier instead.

Preferred medium: Light, airy African violet mix with added perlite or vermiculite.
pH preference: Slightly acidic, about pH 5.5–6.5.
Drainage needs: Excellent drainage and high air porosity.
Growth substrate habit: Fine fibrous roots with a shallow crown; compact root volume.
Substrate recipe notes: Use a peat/coir-based violet mix cut with perlite; keep the crown above the mix.

Type: Balanced fertilizer formulated for African violets or houseplants.
Strength: Quarter- to half-strength.
Frequency: Every 2–4 weeks during active growth.
Seasonal schedule: Feed lightly year-round if growing, but reduce in low-light winter.
Micronutrient notes: Use a product with micronutrients; avoid excess nitrogen that softens growth.

Interval: About every 6–12 months, or when the mix breaks down.
Pot type: Small shallow plastic pot with good drainage; slightly snug is best.
Root sensitivity: Roots are fine and sensitive; repot gently and avoid disturbance.
Dormancy consideration: No true dormancy, but avoid major repotting during bloom stress.
Division guidance: Separate crowns only if the plant has formed obvious offsets or multiple crowns.

Preferred methods: Leaf cuttings, crown division, and tissue culture are standard; seed is uncommon for cultivars.
Difficulty: Easy to moderate.
Expected success: High with healthy leaves and warm, humid conditions.
Optimal timing: Spring to early summer.
Rooting hormone notes: Optional; not usually necessary for leaf cuttings.
Tissue culture notes: Useful for cultivar preservation and uniform clones.

Common pests: Mealybugs, thrips, aphids, fungus gnats, spider mites.
Common diseases: Crown rot, botrytis, root rot, powdery mildew, bacterial leaf spot.
Treatment notes: Isolate infested plants, remove damaged tissue, improve airflow, and adjust watering; use targeted controls if needed.
Susceptibility level: Moderately susceptible, especially to overwatering and crown wetness.
Preventative practices: Clean pots, sterile mix, bottom watering, bright air movement, and prompt removal of old leaves and flowers.

Pets: No strong evidence of serious toxicity; generally considered low-risk, but prevent ingestion.
Humans: Generally low-risk; may cause mild stomach upset if eaten.
Sap irritant: Sap is not commonly considered a major irritant.
Edible?: Not edible; grown as an ornamental.

Dormancy behavior: No true dormancy; may slow in cool or low-light periods.
Typical bloom season: Often intermittent to almost year-round indoors.
Bloom duration: Individual flowers last days to weeks; plants can rebloom repeatedly.
Fragrance: Usually not fragrant or only faintly scented.
Rebloom tendency: High under stable light, warmth, and feeding.
Bloom triggers: Bright indirect light, consistent moisture, regular light fertilization, and warm temperatures.
Pollinator notes: In cultivation, flowers are usually self-managed; insects may visit outdoors.

Growth habit: Compact rosette with showy variegated foliage and purple fantasy blooms.

Rarity: Common in cultivation; cultivar-specific stock may be less common.
Conservation status: Not generally assessed as a conservation concern in horticulture.
Reference links: Check Kew POWO, GBIF, and cultivar registrar records for taxonomic and naming context.
Protected species notes: Cultivar names do not imply wild population protection status.
Collection restrictions: Follow nursery and phytosanitary rules for live plant movement; no special species restriction known.
Import/export concerns: May be subject to standard plant health and soil import rules; ship pest-free and dry enough to avoid rot.
Invasiveness: Low; not considered invasive in typical indoor cultivation.
Native range notes: The species complex originates from tropical East Africa; the cultivar is horticultural and not wild-collected.