Agapanthus 'Black Pantha'
A striking selection noted for very dark buds that open to deep blue‑black flowers in summer. Clumps are semi‑evergreen in mild areas and send up upright stems bearing broad, rounded umbels. Grow in full sun and moist but well‑drained soil; use winter mulch where freezes occur. Like other agapanthus, it is harmful if eaten and sap may irritate skin.
At‑a‑glance
- Group/Class: semi‑evergreen agapanthus cultivar
- Height × spread: 36 to 40 in (90 to 100 cm) × 12 to 20 in (30 to 50 cm)
- Bloom window: mid summer
- Color & flower form: very dark buds; deep blue to blue‑black trumpet‑shaped florets in umbels
- Fragrance: 0 none
- USDA hardiness: 8 to 10; container in colder zones
- Breeder / Year / Origin: unknown
- Cut‑flower notes: strong, tall stems; typical vase life about 7 to 10 days
- Pet safety: avoid
How it differs
- Near‑black bud color uncommon among agapanthus.
- Semi‑evergreen habit in mild climates.
- Large, rounded heads on upright scapes for a dramatic effect.
Strengths
- Showy, saturated flower color.
- Tall stems suit cutting and mid‑border planting.
- Performs well in sunny, coastal positions with drainage.
Care in one minute
- Full sun and shelter from cold, drying winter winds.
- Moist but well‑drained soil; improve drainage before planting.
- Water to keep soil evenly moist during active growth.
- Feed in spring with a balanced fertilizer; avoid excess nitrogen.
- Remove spent stems; divide when clumps become crowded.
- Overwinter containers in a frost‑free place in cold regions.
Watch‑outs
- Tender to hard freezes; mulch or grow in containers outside warm zones.
- Heavy clay or standing water increases crown and root rot risk.
- Slugs and snails can blemish leaves.
Best uses (tags)
architectural, borders, cutting, containers, coastal
Provenance note
Documented by the Royal Horticultural Society with descriptive notes on habit and flower color; often sold under plant breeder’s rights in some markets.
References
- Royal Horticultural Society — Agapanthus ‘Black Pantha’ profile
- Missouri Botanical Garden — Agapanthus (group) profile
- UC ANR — Agapanthus spp. safety note
Written by: Your Flowers Guide editorial team
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