Photo by Melody

PlantFiles: Thryallis, Golden Thryallis
Galphimia gracilis

Family: Malpighiaceae
Genus: Galphimia (gal-FIM-ee-uh) (Info)
Species: gracilis (GRASS-il-is) (Info)

6 members have or want this plant for trade.


4-6 ft. (1.2-1.8 m)

24-36 in. (60-90 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)

Sun Exposure:
Full Sun


Bloom Color:
Bright Yellow

Bloom Time:
Mid Spring
Late Spring/Early Summer
Mid Summer
Late Summer/Early Fall
Mid Fall
Late Fall/Early 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

Soil pH requirements:
5.6 to 6.0 (acidic)
6.1 to 6.5 (mildly acidic)
6.6 to 7.5 (neutral)

Patent Information:

Propagation Methods:
From seed; direct sow outdoors in fall

Seed Collecting:
Allow pods to dry on plant; break open to collect seeds
Wear gloves to protect hands when handling seeds

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7 positives
2 neutrals
1 negative

Gardeners' Notes:

Positive CarolynFleur On Nov 1, 2012, CarolynFleur from Fort Pierce, FL wrote:

Planted 3-gallon thyrallis bushes all over our large setback here in Fort Pierce, FL a year ago September. It is a pretty plant, fast growing, and it blooms all the time. Our biggest problem with these bushes so far is that a couple have split between the branches during windstorms.. In one case, I tied the bush back together and it seems to have mended itself. In the other, one branch had to be removed. Right now we are having a cool spell, and some of the leaves on some of the plants are turning orange. Not dying, just changing color. Didn't happen last year, so I am wondering if the cool weather so early in the fall is causing this or if our recent storm (wind from Hurricane Sandy) is to blame.We are near enough salt water to get some spray and others of our plants have browned along their edges. But as I said, this is bronze, not brown, and there's no sign of drying out and dying.

Neutral sherlie13 On Apr 29, 2012, sherlie13 from Brantford
Canada wrote:

Wondering if I could over winter in a garage, simular to a lantana or brugmansia. Im from SW Ontario Canada and garden centers are offering it for $40.00! Does it like to be cut back to shoot new in the spring, or does it need sun year round? Any suggestions!?

Negative maginot2u On Oct 24, 2011, maginot2u from Bal Harbour, FL wrote:

Thryallis was a delight in my garden. Always full of flowers year round and a quick grower that tripled in size within a year. It seemed to be an ideal plant. Then we recently had torrential downpours here in Miami accompanied by lots of wind. The Thyrallis seemed to be beat to the ground and when I went to right it back up, I found that all the major branches had been split and broken in the middle. I had to prune and remove over 80% of the bush. I do hope it recovers ok.

Positive compost3 On Jan 5, 2011, compost3 from Waco, TX wrote:

I garden at a university in Waco, Tx. Our colors are green and gold, so when I first saw thryallis at a local nursery, I knew that we must try to grow it in 2010 .These plants, though borderline for surviving in zone 8B , have been splendid ,ever-blooming, even in partial shade site, surviving our many 100+ degree days ..Now withstanding upper 20's cold , they are a lovely bronze color.In short, we are thrilled by their performance . More local nurseries should offer this plant !.

Positive fullsun007 On Jul 26, 2009, fullsun007 from Gainesville, FL wrote:

I Have had this plant for over 2 years in my garden, and since have added a couple more of them. These plants love full sun but I have found that mine like a little supplemental water occasionally during the heat of summer. This winter we had 2 nights of back to back lows of 21oF, this did not faze this plant only a handful of leaves on this 5 feet shrub turned a slight redish color, otherwise it was business as usual, and there was no overhead protection. This plant as others have pointed out here is pure sunshine. Mine bloom here in zone 8B from June-November. Each flower seems to produce a seed pod, however, I have never had problems with volunteers. I have mine planted with firebush, which where knocked to ground during that freeze. If you have a sunny location and don't mind this getting 5-7 feet tall and constantly covered in dainty yellow flowers, then this is worth a try (it can be pruned hard) certainly in zone 8B maybe even 8A.

Positive Musgrave On Sep 18, 2005, Musgrave from Brandon, FL wrote:

This bush is a strong grower that flowers all summer. It will grow with no help after it is established . It will not become a problem as it does not spread except ocasionally . Ed Brandon FL

Positive Stuber On Aug 4, 2005, Stuber from Fernandina Beach, FL wrote:

I would emphasize this plant is a "pure sun play" -- mine only get about 5 hours a day, and while healthy, they do tend to get a bit leggy. Having said that, they are reliable bloomers in late summer even in that situation and I just whack 'em back in the late winter to keep them looking well rounded and full. Great plant and a really nice, semi-wild looking shrub with clear, bright yellow blooms for the informal garden. Also a great choice if you wanted to fill a large area with a lot of blooming shrubs as a backdrop. Even when not in bloom it's structure and leaf color are interesting.

Positive theplantdoctors On Apr 9, 2004, theplantdoctors from Largo, FL wrote:

This is a great addition to the potted garden as well as the beds. It will tolerate salty conditions as well as dry soil. Blooms Blooms Blooms all the time in FL.

Positive htop On Mar 18, 2003, htop from San Antonio, TX (Zone 8b) wrote:

San Antonio, Texas 3/18/93

Excellent heat tolerant, xeriscape plant. It is a robust bloomer which tolerates a variety of well drained soils. Extreme cold will cause it to die back to the ground; however, it will resprout in the spring. Mild cold causes the leaves to turn a bronzy to reddish color. Poor salt tolerance requres it to be shielded by other plants in coastal regions, but it must receive a fair amount of sunlight in order to encourage blooms and discourage legginess. To increase fullness and thus more blooms, it can be pruned after the last freeze.

Neutral bleu On Aug 4, 2002, bleu wrote:

Very showy and easy to grow. Blooms almost continually. Will become leggy in low-light. Tolerant of brief periods of very cold weather. Branches are brittle and break easily. Will rot and die if over-watered. Self-seeding but not so much as to be a nuisance, just enough so that you can pot up some new bushes which grow very rapidly to a good size. Trim in the winter to promote a thicker bushes.


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

Bartow, Florida
Boca Raton, Florida
Bokeelia, Florida
Boynton Beach, Florida
Brandon, Florida
Brooksville, Florida
Debary, Florida
Eustis, Florida
Fernandina Beach, Florida
Fort Lauderdale, Florida
Fort Pierce, Florida
Gainesville, Florida
Hobe Sound, Florida
Hollywood, Florida
Lakeland, Florida
Largo, Florida
Lutz, Florida
Melbourne Beach, Florida
Miami, Florida
Odessa, Florida
Palm Coast, Florida
Pensacola, Florida (2 reports)
Pompano Beach, Florida
Port Richey, Florida
Port Saint Lucie, Florida
Sebastian, Florida
Tampa, Florida
Titusville, Florida
Trenton, Florida
Wauchula, Florida
Wellborn, Florida
Williston, Florida
Winter Springs, Florida
Rincon, Georgia
Kihei, Hawaii
New Orleans, Louisiana
Ladys Island, South Carolina
Austin, Texas
Boerne, Texas
Cedar Park, Texas
Georgetown, Texas
Harlingen, Texas
Jacksonville, Texas
Spring Branch, Texas
Waco, Texas
Norfolk, Virginia

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