Gladiolus italicus
Gladiolus italicus · Iridaceae
The gardener's calendar
Ideal time to plant gladiolus italicus: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Foliage
- Deciduous
- Flowering
- June to July
- Mature size
- 60 to 90 cm in height
- Growth
- Fast
- Hardiness
- Low hardiness (−5 °C)
- Origin
- Mediterranean (Italy, Balkans)
- Soil type
- Well-drained, light to medium
Care
Watering
Water regularly during growth and flowering, keeping the soil moist but not waterlogged. Reduce watering after flowering and stop once the foliage has dried. In winter, keep the bulb dry if you leave it in the ground or in a pot.
Exposure
Place your gladiolus in full sun for generous flowering and well-colored blooms. A minimum of 6 hours of direct sunlight daily is recommended. A south or west-facing exposure is ideal.
Soil
Prepare well-drained, light soil that is slightly rich in organic matter. Add sand or gravel if your soil is too compact to prevent bulb rot. Avoid excessively chalky soils.
Fertilizing
Apply balanced fertilizer or potassium-rich fertilizer at the start of growth and when flower buds form. Monthly applications are sufficient during the growing season. Stop after flowering.
Pruning and cutting
Cut flowers by removing the stem above a leaf to encourage secondary flowering. After flowering, leave the foliage in place until it completely dries to rebuild the bulb. Then remove the withered stem.
Diseases and pests
Watch for bulb rot if there is excess moisture. Aphids and thrips can damage flowers and foliage. Ensure good air circulation and water at the base to reduce fungal risks.
Did you know?
The Corn Gladiolus is a wild flower typical of Mediterranean grain fields, once so abundant that it was considered a weed. Its Latin name "Gladiolus" comes from the Latin word "gladius" (sword), referring to the elongated and pointed shape of its leaves. This hardy plant inspired many modern ornamental hybrids, but the Italian species remains a botanical curiosity prized by collectors.
Where to buy it
Plant the bulbs in autumn for spring flowering. Pick a plant with healthy foliage and roots that are not exposed. Best time: from September to November.
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Tips generated and checked by Viridia — adapt them to your local climate.