About
An upright, cormous perennial to about 60cm, with narrow, sword-shaped leaves. Each corm produces a spike of white, funnel-shaped flowers with purple anthers in mid-summer.
About the genus
Gladiolus are cormous perennials with fans of sword-shaped or linear leaves and spikes of funnel-shaped flowers
Growing conditions
SunlightFull sun
Soil typeChalk, Loam, Sand
Soil pHAcid, Alkaline, Neutral
Soil moistureWell-drained
AspectSouth-facing
ExposureSheltered
UK hardinessH3
Plant details
Plant typeBulbs
HabitColumnar upright
FoliageDeciduous
Height0.5-1 metres
Spread0-0.1 metre
Time to full height1-2 years
Suggested usesCity and courtyard gardens, Patio and container plants, Coastal, Cottage and informal garden
ToxicityOrnamental 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
CultivationGrow gladioli in fertile, well-drained soil in full sun. Plant corms 10-16cm deep (4-6in) in spring. If the soil is not perfectly drained, plant the corms on a bed of sand. When the flower spikes reach one third to half their final height, feed with a potassium-rich fertiliser such as a tomato feed. Repeat every 10-14 days until three weeks after flowering. In areas where there is frost, lift the corms when the foliage has turned yellow-brown. Snap the stem off the corms and dry the corms off for 14 days and keep the new corms dry and frost-free until planting time
PruningSnap off old stems from the corms when lifting them for winter storage
PropagationPropagate by separating cormlets when dormant
Pest resistanceMay be susceptible to gladiolus thrip, aphids and slugs
Disease resistanceMay 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