Thryallis, Delivered and Planted in Southwest Florida
Thryallis is a sun-loving shrub covered in small golden-yellow flower clusters through much of the year, and it does well in Southwest Florida's sandy soil with little care. It makes a loose hedge or mass planting at 4 to 6 ft. It is cold-sensitive and not for salt spray. We deliver and plant 3 gallon shrubs.
- Light:
- Full sun
- Water:
- Low to moderate; drought tolerant once established
- Salt:
- Low; not for salt spray
Thryallis sizes we deliver and plant
Every size below is planted by our crew, set at the right depth and watered in. Send the size and how many, and we text back a planted price, usually within the hour during the day.
| Plant | Sizes |
|---|---|
| Thryallis | 3 Gallon |
Thryallis in SW Florida, at a glance
- Mature size here
- 5 to 8 ft tall and 4 to 6 ft wide; easily kept lower
- Light
- Full sun
- Water
- Low to moderate; drought tolerant once established
- Salt tolerance
- Low; not for salt spray
- Cold tolerance
- Frost burns the foliage and a hard freeze can cut it back; it regrows from the roots
- Growth rate
- Moderate
- Spacing
- 3 to 4 ft apart for a hedge or mass
- Florida native
- No
- Botanical name
- Galphimia glauca
Where Thryallis works in a SW Florida yard
Thryallis suits sunny, low-water beds where you want a steady yellow. Plant it in a row along a fence, as a loose border behind lower plants, or in groups of three to five at the back of a bed. Its soft green leaves and golden flowers pair well with Purple Queen, Blue Daze and Plumbago for a bright mix.
Branches are brittle, so keep it out of tight walkways and high-traffic corners.
- Yellow flowering hedge
- Sunny mass planting
- Low-maintenance foundation bed
- Fence line color
How our crew plants it
Thryallis wants full sun and well-drained soil, and it takes sandy soil of any kind but not salt. Dig twice as wide as the pot, set the root ball level with the soil and space plants 3 to 4 ft apart for a hedge.
Backfill with native soil, water in well and mulch lightly. Lee and Collier allow extra watering on new plantings.
Care after planting
- Water new plants on the extra schedule allowed for new plantings, then ease off, since established plants handle dry spells.
- Prune lightly after a bloom flush to keep it compact, because a hard spring cutback pauses flowering for a while.
- Feed in spring and fall, and skip nitrogen and phosphorus from June 1 to September 30 in Lee County, Naples and Marco Island.
- Wait for spring to cut back any frost damage.
What to watch for
- Branches are brittle and snap in strong wind or foot traffic, so keep it off tight walkways.
- Salt spray and flooding with salty water damage it, so skip waterfront and beachside planting.
Thryallis questions we hear
How big does thryallis get?+
Plan on 5 to 8 ft tall and 4 to 6 ft wide when left alone, although it is easy to keep at 4 to 6 ft with light pruning. It grows at a moderate pace, so a hedge from 3 gallon plants takes a couple of seasons to fill. Space plants 3 to 4 ft apart.
When does thryallis bloom in Southwest Florida?+
Heaviest in summer and fall, with scattered flowers much of the rest of the year in mild winters. Full sun gives the most blooms, and shade makes it leggy with fewer flowers. A heavy spring cutback pauses flowering for a while, so trim lightly.
Is thryallis salt tolerant or cold hardy?+
Not very. UF/IFAS says it does not tolerate salt water or spray, so keep it back from the water. Frost burns it and a hard freeze can cut it to the ground, though it regrows from the roots. Zones 9 to 11 are its range.
Updated October 2026
Get a planted price on Thryallis
Tell us what and how many. Quinten prices it from the nursery's live list and texts you back, usually within the hour during the day.
Only need the plant delivered, no planting? It is on our nursery's list at Palm & Plant Co.
Also worth a look
More like this
All hedges & shrubs
The service
Hedge and privacy screen installation
Planning a whole yard
See it in 3D first
We deliver and plant across Cape Coral, Fort Myers, Naples, Estero, Bonita Springs and about an hour around.