Gladiolus Species, Hardy Gladiolus, Jacob's Ladder, Sword Lily

Gladiolusbyzantinus

Family
Iridaceae (eye-rid-AY-see-ee)
Genus
Gladiolus (GLAD-ee-oh-lus)
Species
byzantinus (biz-an-TEE-nus)
Synonym
Gladiolus bornetii
Gladiolus communis subsp. byzantinus
Gladiolus communis var. byzantinus
Sun Exposure
Full Sun
Foliage
Herbaceous
Height
18-24 in. (45-60 cm)
Spacing
3-6 in. (7-15 cm)
Hardiness
USDA Zone 5a: to -28.8 °C (-20 °F)
USDA Zone 5b: to -26.1 °C (-15 °F)
USDA Zone 6a: to -23.3 °C (-10 °F)
USDA Zone 6b: to -20.5 °C (-5 °F)
USDA Zone 7a: to -17.7 °C (0 °F)
USDA Zone 7b: to -14.9 °C (5 °F)
USDA Zone 8a: to -12.2 °C (10 °F)
USDA Zone 8b: to -9.4 °C (15 °F)
USDA Zone 9a: to -6.6 °C (20 °F)
USDA Zone 9b: to -3.8 °C (25 °F)
USDA Zone 10a: to -1.1 °C (30 °F)
USDA Zone 10b: to 1.7 °C (35 °F)
Danger
Parts of plant are poisonous if ingested
Handling plant may cause skin irritation or allergic reaction
Bloom Color
Magenta (pink-purple)
Bloom Time
Mid Spring
Late Spring/Early Summer
Other Details
Category
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Blue-Green
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)
Patent Information
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; sow indoors before last frost
From seed; direct sow after last frost
Seed Collecting
Bag seedheads to capture ripening seed
Allow pods to dry on plant; break open to collect seeds
Regional

This plant is said to grow outdoors in the following regions:

Vincent, Alabama

Ozone, Arkansas

Paris, Arkansas

Idyllwild, California

Gainesville, Florida

Braselton, Georgia

Moreland, Georgia

Algonquin, Illinois

Winnetka, Illinois

Olathe, Kansas

Carlisle, Kentucky

Baton Rouge, Louisiana

Bordelonville, Louisiana

Doyline, Louisiana

Elm Grove, Louisiana

Springfield, Massachusetts

Florence, Mississippi

Panama, New York

Aulander, North Carolina

Elizabeth City, North Carolina

Raleigh, North Carolina

Florence, South Carolina

Saint Helena Island, South Carolina

Memphis, Tennessee

Burleson, Texas

Colmesneil, Texas

Dallas, Texas

Fate, Texas

Harker Heights, Texas

Houston, Texas

Iredell, Texas

Kurten, Texas

Nevada, Texas

Richmond, Texas

Tyler, Texas

Kinnear, Wyoming

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Featured Videos

Gardener's Notes:

6
positives
2
neutrals
0
negative
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J
| May 2011 | positive

I live near Ottawa, in Canada (about USDA zone 4, I believe...) and I planted about 20 of those in a clump last fall. I planted them on t...Read More

N
Algonquin, IL (Zone 5a) | May 2010 | positive

This is my first year with Gladiolus Byzantinus. I ordered them from Brent & Becky's & they were planted in October 2009.

...Read More

L
Central, AL (Zone 7b) | January 2009 | neutral

I received a handful of these byzantine glads. from a friend. I potted them up, they stayed dormant all through the growing season. I t...Read More

J
Fort Jennings, OH | November 2008 | positive

Bloom color can vary from deep purple red to dark hot pink. In my Ohio zone 5 garden it blooms late May/early June with yarrow and colum...Read More

V
(Zone 8a) | April 2007 | positive

Dainty and cheerful, does not need staking. Very special for me as received from a special friend.

P
Deal, NJ (Zone 7a) | May 2005 | positive

Thhis plant as stated is "daintier" and more delicate than regular gladiolus..... the blossoms are smaller.... but still very showy......Read More

D
Elm Grove, LA | May 2004 | positive

I find this heirloom plant very fulfilling and very common around NW Louisiana where I reside. I acquired my corms from old abandoned hom...Read More

T
T
Murfreesboro, TN (Zone 7a) | August 2001 | neutral

A more dainty plant than the modern cultivars, G. byzantinus is a very old plant that works well in cottage gardens. Its delicate blooms...Read More

Featured
Clouded Plant Bug
(Neurocolpus nubilus)
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(Tockus erythrorhynchus)
Featured
Clouded Plant Bug
(Neurocolpus nubilus)
Red-billed Hornbill
(Tockus erythrorhynchus)