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Growing gladiolus flowers can be a rewarding experience, but timing is crucial to ensure healthy blooms. The division of gladiolus corms is an essential step in maintaining plant health and encouraging vigorous flowering. However, the best time to divide varies depending on your region’s climate and growing season.
Understanding Gladiolus Division
Gladiolus corms develop offsets or daughter corms over time. Dividing these corms helps prevent overcrowding, reduces disease risk, and promotes better flowering. Proper timing ensures the plant’s energy is directed toward healthy growth and flowering in the subsequent season.
Timing for Different Regions
Temperate Regions
In temperate zones, the best time to divide gladiolus corms is late winter to early spring, typically between February and March. This allows the corms to recover before the active growing season begins in spring and summer.
Subtropical and Tropical Regions
In warmer climates, division can be done in late fall after the flowering period or in early spring before new growth starts. This timing helps the corms establish during the cooler months and avoids the peak heat of summer.
Northern Climates
In northern regions with shorter growing seasons, divide gladiolus corms in late fall, after the plants have finished flowering and the foliage has died back. Store the divided corms in a cool, dry place until planting in spring.
Steps for Proper Division
- Carefully dig up the corms after the plant’s foliage has yellowed or died back.
- Gently clean off the soil and inspect the corms for healthy, firm tissue.
- Separate the offsets from the main corm using a sharp, sterilized knife if necessary.
- Trim any damaged or diseased tissue with clean scissors.
- Allow the divided corms to dry in a well-ventilated area for a few days.
- Store in a cool, dry place until planting time.
Additional Tips
Always use sterilized tools to prevent disease transmission. Avoid dividing corms during humid or rainy weather to reduce the risk of rot. Proper storage and handling will ensure your gladiolus plants remain healthy and vibrant for seasons to come.