Gladiolus callianthus (Acidanthera)
Gladiolus callianthus (often sold as acidanthera) produces elegant, starry white flowers with a rich, red-purple throat that adds a refined, exotic feel to late-summer borders, patio pots, and cutting gardens.
Reaching an established height of around 80–100cm, it sends up slender stems lined with multiple buds that open in succession, extending the display over several weeks and providing excellent cut flowers.
Plant corms in spring once the soil has warmed, in a sunny, sheltered position with fertile, well-drained soil. In heavier ground, plant on a gritty layer or grow in containers for sharper drainage.
Water after planting and during dry spells while growth is active, then feed every two to three weeks once stems develop. Taller stems may benefit from discreet support in windy gardens.
Perfect for borders, pots and floral arrangements, this fragrant gladiolus pairs beautifully with grasses and late-summer perennials. In colder areas, lift and store corms frost-free once foliage dies back.
| Botanical name | Gladiolus murielae (syn. Gladiolus callianthus, Acidanthera murielae) |
| Flower colour | White with deep red-purple throat |
| Bulb size | 8/10 |
| Established height | 80–100 cm |
| Established spread | 15 cm |
| Plant spacing | 50 corms per m² |
| Leaf colour | Green |
| Habit | Upright |
| Life cycle | Perennial |
| Hardiness | Tender |
| Years to establish | 1st year |
| Sunlight | Full sun |
| Position | Exposed or Sheltered |
| Suitable for | Pots, Borders, Cutting garden |
| Soil acidity | Any |
| Soil moisture | Well-drained |
| Soil type | Chalk, Clay, Loam, Sand |
| RHS Award (AGM) | No |
| Growing skill | Easy to grow |
| Pollinator-friendly | Yes |
| Deer resistant | No |
Planting and Flowering Calendar
Key Features
Packed in paper
Packed peat-free
Great for Shade
Fragrant
Perfect for pots
Good for cutting

