About
Gladiolus 'Amsterdam' is a tall variety, reaching heights of approximately 1 to 1.5 meters. It features elongated, sword-shaped green leaves and produces an upright flower spike that typically holds 12 to 15 buds. Once fully open, the flowers display a clean, bright white color accented by a subtly creamy-white throat. This gladiolus offers robust, vertical blooms that enhance summer gardens.
About the genus
Gladiolus are perennial plants that grow from corms, featuring clusters of long, narrow leaves resembling swords. They produce tall flower spikes adorned with funnel-shaped blooms.
Growing conditions
- Sunlight
- Full sun, Partial shade
- Soil type
- Chalk, Loam, Sand
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Moist but well-drained, Well-drained
- Aspect
- South-facing, West-facing, East-facing
- Exposure
- Sheltered
- UK hardiness
- H3
Plant details
- Plant type
- Bulbs
- Habit
- Columnar upright
- Foliage
- Deciduous
- Height
- 1-1.5 metres
- Spread
- 0.1-0.5 metres
- Time to full height
- 2-5 years
- Suggested uses
- City and courtyard gardens, Cottage and informal garden, Sub-tropical
- Toxicity
- Ornamental bulbs, not to be eaten. Wear gloves and other protective equipment when handling. Pets: Harmful if eaten. For further information and contact numbers regarding pets, see the HTA guide to potentially harmful plants
Care notes
- Cultivation
- Grow in fertile, well-drained soil in full sun, planting the corms 15cm deep in spring, on a bed of sharp sand to aid drainage; in frost-prone areas, lift when the leaves turn yellow-brown, and store the new corms in a dry, frost-free place until the following spring; in milder areas, add a thick dry mulch over winter
- Pruning
- No pruning required
- Propagation
- Propagate by division, separating cormlets when dormant
- Pest resistance
- May be susceptible to gladiolus thrip, aphids and slugs
- Disease resistance
- May be susceptible to gladiolus corm rot, grey moulds (Botrytis), Fusarium bulb rot, gladiolus core rot, gladiolus dry rot, gladiolus scab and neck rot, fungal leaf spot, and virus diseases