Illustration
Lavender Gladiolus
Gladiolus
Lavender Gladiolus blooms from July through August.
Months here are Northern Hemisphere months; in the Southern Hemisphere, shift them by six months.
Growing Lavender Gladiolus
Plant it in full sun. It prefers moderate water. It is hardy in USDA zones 7–10. Expect it to reach about 4 ft tall and 0.5 ft wide at maturity, in roughly 1 year (not yet checked).
What was checked
Mature height and spread, hardiness zones, sun and the trait tags were checked against named botanical sources for this plant. The bloom months and water need on this page were not, and each fact above says which. The planting, spacing and size sections are derived from these checked facts by a fixed rule, not checked separately, and the plant type is the library's own classification.
When to plant Lavender Gladiolus
Lavender Gladiolus is a summer bulb planted in spring: get it in after the last frost, once the soil has warmed, March or April in zone 8, the middle of its hardy zones 7 to 10. It is hardy in zones 7 to 10, where it can stay in the ground over winter; colder than zone 7, lift and store it before the ground freezes. Expect flowers from July to August.
Month-by-month timing for your zone is on the planting calendar; if you garden near zone 8, the middle of this plant's hardy range, start with zone 8 in March. Derived from the plant's category, zones and bloom months plus typical zone frost dates, not checked separately.
How big does Lavender Gladiolus get?
4 fttall5 ft 7 inan adult0.5 ftwideSee Lavender Gladiolus in a garden plan: the planner shows it in 3D beside everything else you add, growing toward this size over the years.
Where these facts come from
Lavender Gladiolus' height, spread, hardiness zones, sun and trait tags were checked against 9 published sources on July 29, 2026. Each one is linked below with every fact it carried, which can include a fact this page still marks as not yet checked, because a source carrying a value is not the same as the value being held to the standard. Facts not in that list, and the planting, spacing and size sections, are not covered by these sources.
- easytogrowbulbs.comEasy to Grow Bulbsheight, spread, hardiness zones, sun and trait tags
- Missouri Botanical Gardenheight, spread, hardiness zones, sun and trait tags
- NC State ExtensionPlant Toolboxheight, spread, hardiness zones, sun and trait tags
- American Meadowsheight, hardiness zones, sun and trait tags
- Longfield Gardensheight, hardiness zones and sun
- Breck'sheight and sun
- Clemson Home and Garden Information CenterClemson Cooperative Extension HGICsun and trait tags
- extension.missouri.eduUniversity of Missouri Extension, Summer Flowering Bulbs: Gladiolus (G...sun and trait tags
- University of Georgia ExtensionB918height and trait tags
How the checking works, and what each standard covers, is on the verified plants page.
Good to know about Lavender Gladiolus
Curated from university extensions, botanic gardens and other primary sources, with the source named on every note.
Safety
Toxic to dogs, cats and horses; the toxins concentrate in the corm. Eating it usually causes drooling, vomiting, lethargy and diarrhea. per ASPCA
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Design a garden with this
Drop this plant onto a 3D plan, see how it fills in, and watch your whole garden bloom across the year.