Trimezia Species, Forenoon Yellow Flag, Yellow Walking Iris

Trimeziamartinicensis

Family
Iridaceae (eye-rid-AY-see-ee)
Genus
Trimezia (try-MEE-zee-uh)
Synonym
Cipura martinicensis
Iris martinicensis
Trimezia connata
Trimezia lurida
Trimezia meridensis
Sun Exposure
Light Shade
Partial to Full Shade
Foliage
Grown for foliage
Evergreen
Smooth
Height
24-36 in. (60-90 cm)
Spacing
3-6 in. (7-15 cm)
Hardiness
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)
USDA Zone 11: above 4.5 °C (40 °F)
Danger
N/A
Bloom Color
Bright Yellow
Bloom Time
Blooms all year
Blooms repeatedly
Other Details
Category
Bulbs
Perennials
Water Requirements
Average Water Needs; Water regularly; do not overwater
Foliage Color
Where to Grow
Bloom Characteristics
Bloom Size
Other details
Soil pH requirements
6.6 to 7.5 (neutral)
7.6 to 7.8 (mildly alkaline)
Patent Information
Propagation Methods
By dividing rhizomes, tubers, corms or bulbs (including offsets)
Seed Collecting
Regional

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

Anniston, Alabama

Apopka, Florida

Bokeelia, Florida

Brandon, Florida

Fort Lauderdale, Florida(2 reports)

Holiday, Florida

Loxahatchee, Florida

Miami, Florida

North Port, Florida

Port Saint Lucie, Florida

Rockledge, Florida

Saint Petersburg, Florida(2 reports)

Summerland Key, Florida

Tampa, Florida

Umatilla, Florida

Venice, Florida

West Palm Beach, Florida

Zephyrhills, Florida(2 reports)

Jesup, Georgia

Charleston, South Carolina

Beaumont, Texas

Christiansted, Virgin Islands

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Gardener's Notes:

10
positives
1
neutral
0
negative
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J
Oakland, SC | September 2021 | positive

Charleston, SC - I have successfully grown this plant in the ground for years. It dies back in winter but as soon as the weather whispers...Read More

S
S
Coronaca, SC | May 2013 | positive

The correct "scientific" name for this plant is Trimezia martinicensis. Those referring to it as Neomarica have probably just repeated so...Read More

I
Keizer, OR (Zone 8b) | March 2013 | neutral

Don't understand why Dave's calls this Trimezia martinicensis when every other site I've found calls it Neomarica longifolia. Is it MOBOT...Read More

P
Deep East Texas, TX (Zone 8a) | July 2006 | positive

Beautiful delicate blooms make this an interesting iris. N. longifolia is not winter hardy so it is kept in a hanging basket. Then, pro...Read More

S
S
Franklin, LA (Zone 9a) | June 2005 | positive

This is one of my favorite plants. Very cheerful, blooming abundantly almost year round, if protected from hard freezes. The foliage is...Read More

P
Kailua, HI (Zone 11) | July 2004 | positive

One day a few years ago my neighbor and I traded her yellow for my blue (gracilis) over the fence. Like both very much and both do very ...Read More

P
Savannah, GA (Zone 8b) | May 2004 | positive

I have had this plant for years and shared it with many people. It will die back in the winter, but then a lot of it comes back in the Spring.

J
Sebring, FL (Zone 9b) | December 2003 | positive

I lived in Tampa in the early 1980's, and rented a house with a bricked in flower bed with nothing but weeds. I pulled up the weeds, and ...Read More

T
Plant City, FL | October 2003 | positive

In 1989 I inherited a pot of tall upright flexible medium green leaves. I had no clue what it was. The pot was shallow and broken, the pl...Read More

E
Seffner, FL | April 2003 | positive

This is an easy to grow plant. It flowers all spring and summer long. Sends out shoots that lay down and root into baby plants (walking...Read More

L
Pompano Beach, FL | April 2003 | positive

Sold as Louisiania Walking Iris in most nurseries here - zone 10b. Easy to grow, spreads through shoots which lay down - then root.

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