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Thryallis (Galphimia gracilis), Shrub
Shrub

Thryallis

Galphimia gracilis

Traits

Pollinator FriendlyZone 9a Hardy

Varieties We Bring In

StandardGalphimia gracilis
Sizes & Pricing
3 galFrom$14.95

Last received Jul 19, 2026.

We bring this in seasonally, so what is on the lot changes week to week. A received date shows when it last came in, not that it is here today.

Call (904) 471-0440 to confirm this plant and size before you make the trip.

LightFull Sun, Part Sun
WaterLow
Mature size5-9 feet × 4-6 feet
Visit Nursery

Pet toxicity: not on file, check before planting where pets chew

Pet safety guide

About Thryallis

Thryallis (Galphimia gracilis) is a fast-growing tropical shrub native to Mexico and Central America, producing clusters of bright golden-yellow flowers from summer through fall. It thrives in NE Florida's warm climate as a landscape shrub, butterfly attractor, or informal hedge, rebounding readily from roots if damaged by an occasional freeze.

Plant details

Bloom Season
Summer, Fall
Flower Color
Yellow
Growth Rate
Fast
Foliage
Evergreen
Soil
Sandy, Loam, Well-drained

Best planting months

Recommended forZone 9b · St. Augustine, FL

Recommended months: March, April, May, September, October, November.

January, other month
February, other month
March, good window
April, good window
May, good window
June, other month
July, other month
August, other month
September, good window
October, good window
November, good window, this month
December, other month
This monthGood windowOther months

Seasonal care

Bloom season. Good planting window.

Care essentials

Light

Thrives in full sun; tolerates part sun but blooms best with at least 6 hours of direct sun — a prime spot in NE Florida's landscape for maximum golden-yellow flower production.

Water

Drought tolerant once established; water regularly during the first season to establish roots, then reduce irrigation — overwatering leads to root rot in well-drained sandy Florida soils.

Soil & Fertilizer

Grows well in NE Florida's sandy or loamy, well-drained soils; apply a balanced slow-release fertilizer in spring, but avoid excess nitrogen which promotes leggy growth at the expense of flowering.

Similar needs

Coral Bean

Coral Bean

Shares 5 of the same needs: full sun, low water, sandy, zone 9a hardiness, and pollinator-friendly.

From $7.95Same conditions
Deerberry

Deerberry

Shares 5 of the same needs: full sun, low water, sandy, zone 9a hardiness, and pollinator-friendly.

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Firebush

Firebush

Shares 5 of the same needs: full sun, low water, sandy, zone 9a hardiness, and pollinator-friendly.

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Florida Privet

Florida Privet

Shares 5 of the same needs: full sun, low water, sandy, zone 9a hardiness, and pollinator-friendly.

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Quailberry

Shares 5 of the same needs: full sun, low water, sandy, zone 9a hardiness, and pollinator-friendly.

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Rusty Lyonia

Rusty Lyonia

Shares 5 of the same needs: full sun, low water, sandy, zone 9a hardiness, and pollinator-friendly.

From $19.95Same conditions

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Common questions

Is Thryallis a good plant for St. Augustine?

Thryallis is a shrub. Mature size: 5-9 feet × 4-6 feet. Light: Full Sun, Part Sun. Water needs: Low. Recorded hardiness zone: 9a.

Care information verified from

Last reviewed February 2026. Our care guidance comes from trusted horticulture sources and decades of helping St. Augustine gardeners. Conditions here can vary dramatically from one area to the next, so come ask us and we'll tailor it to your yard.