Celstial Lily, Celestial Ghost Iris, Prairie Celestial

Nemastylis geminiflora

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Nemastylis (nee-ma-STY-lis) (Info)
Species: geminiflora (jem-in-ih-FLOR-uh) (Info)



Water Requirements:

Drought-tolerant; suitable for xeriscaping

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun

Sun to Partial Shade


Unknown - Tell us

Foliage Color:



6-12 in. (15-30 cm)


9-12 in. (22-30 cm)


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)

Where to Grow:

Can be grown as an annual


Unknown - Tell us

Bloom Color:

Light Blue

Dark Blue

Bloom Characteristics:

Unknown - Tell us

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Winter/Early Spring

Mid Spring

Other details:

Unknown - Tell us

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

By dividing rhizomes, tubers, corms or bulbs (including offsets)

Seed Collecting:

Allow pods to dry on plant; break open to collect seeds

Properly cleaned, seed can be successfully stored


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

Arlington, Texas

Dripping Springs, Texas(2 reports)

Hondo, Texas

Houston, Texas

Kerrville, Texas

Lipan, Texas

Merit, Texas

New Braunfels, Texas

San Antonio, Texas(2 reports)

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Gardeners' Notes:


On May 5, 2016, marasri from Dripping Springs, TX wrote:

They grow in a clay deposit in a field around my shop. The dirt has never been altered or amended. They do not grow in my limestone gravely soil or the caliche. They are a sign of a nice wet spring. They do not show their faces in droughty years. I do not water or tend to them in any way and they are fine with it other than taking the dry years off. I tried moving it and it did not take. I did move it to under some oak trees in a limestone soil and shade. I love them and want many more. I am thinking about collecting some seeds and propagating them this fall. Any ideas of how to treat the seed?
I read somewhere that they do not like to be moved when they are blooming. And one can plant the seeds in fall here in Texas.I will be trying to grow from seed this fall.


On Oct 13, 2006, dmj1218 from west Houston, TX (Zone 9a) wrote:

These bulbs like to be dry when dormant; blooms open midmorning and fade before sundown; blooms March thru May in TX; flowers in shades of blue with the occasional white; native to TX, OK, KS, MO, ARK, LA, MS, ALA, and TN.