How to grow gladiolus
Gladiolus x hortulanus
When to plant gladiolus
Plant gladiolus corms in spring after the danger of frost is past (Iowa State: early to mid-May in Iowa). Make successive plantings every two weeks for continuous bloom. In cold zones the corms are dug and stored over winter; hardy varieties can overwinter with a layer of mulch (NC State).
Gladiolus is timed by season rather than your frost dates, so the planting calendar does not generate ZIP-specific dates for it. Check the cited sources below to fine-tune for your area.
Growing conditions
- Lifecycle
- Perennial
- Spacing
- 6 in apart
- Planting depth
- 3 in
- Sun
- Full sun
Common problems
- thrips
- bulb rot
- failure to bloom
Sources
- Iowa State University Extension and Outreach, Yard and Garden: How deep should I plant gladiolus bulbs? / When should I plant gladiolus bulbs outdoors?
- NC State Extension Gardener Plant Toolbox: Gladiolus
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