Photo by Melody

PlantFiles: Chasmanthe
Chasmanthe bicolor

Family: Iridaceae (eye-rid-AY-see-ee) (Info)
Genus: Chasmanthe (chas-MAN-thee) (Info)
Species: bicolor (BY-kul-ur) (Info)

One vendor has this plant for sale.

8 members have or want this plant for trade.

Tropicals and Tender Perennials

36-48 in. (90-120 cm)

6-9 in. (15-22 cm)

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)

Sun Exposure:
Full Sun
Sun to Partial Shade

Unknown - Tell us

Bloom Color:
Chartreuse (Yellow-Green)

Bloom Time:
Late Winter/Early Spring
Mid Winter


Other details:
This plant is attractive to bees, butterflies and/or birds
Drought-tolerant; suitable for xeriscaping
Average Water Needs; Water regularly; do not overwater
Self-sows freely; deadhead if you do not want volunteer seedlings next season

Soil pH requirements:
Unknown - Tell us

Patent Information:

Propagation Methods:
By dividing rhizomes, tubers, corms or bulbs (including offsets)
From seed; direct sow outdoors in fall
From seed; direct sow after last frost

Seed Collecting:
Allow seedheads to dry on plants; remove and collect seeds

Click thumbnail
to view:

By Kelli
Thumbnail #1 of Chasmanthe bicolor by Kelli

By Kelli
Thumbnail #2 of Chasmanthe bicolor by Kelli

By MissTruly
Thumbnail #3 of Chasmanthe bicolor by MissTruly

By MissTruly
Thumbnail #4 of Chasmanthe bicolor by MissTruly

By BayAreaTropics
Thumbnail #5 of Chasmanthe bicolor by BayAreaTropics

By BayAreaTropics
Thumbnail #6 of Chasmanthe bicolor by BayAreaTropics

By sdjimbob
Thumbnail #7 of Chasmanthe bicolor by sdjimbob

There are a total of 9 photos.
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2 positives
2 neutrals
No negatives

Gardeners' Notes:

Neutral sdjimbob On Dec 7, 2012, sdjimbob from San Diego, CA wrote:

In Southern California, it starts shooting up leaves once the fall rains start (October through December), although it seems to tolerate summer irrigation without issue. Usually blooms in the middle of winter (January), then by about early June, leaves die off and it's dormant until fall.

Spreads readily, but not too difficult to dig up or even yank up if the soil is moist enough.

Neutral Ravens444 On Feb 21, 2010, Ravens444 from Mission Viejo, CA (Zone 9b) wrote:

This plant can be invasive! It produces bulbs and seeds that have a high success rate!

Positive Kelli On Oct 12, 2004, Kelli from L.A. (Canoga Park), CA (Zone 10a) wrote:

In my region, as easy as weeds to grow.

Positive soilsandup On Jan 8, 2004, soilsandup from Sacramento, CA (Zone 9a) wrote:

My chasmanthe bloomed this year! I guess it finally got the right conditions. The blooms are a vivid yellow - stalks about 4 feet high. Hopefully this is going to be the start of a yearly bloom cycle.


This plant has been said to grow in the following regions:

Canoga Park, California
Fallbrook, California
Mission Viejo, California
Novato, California
Sacramento, California
San Diego, California
San Francisco, California
West Hollywood, California

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