Galphimia glauca

thryallis

Also known as: Rain of Gold, Golden Shower, Shower of Gold

Thryallis is a cheerful tropical flowering shrub known for its clusters of bright golden yellow flowers and fresh green foliage. Native to Mexico and Central America, this sun loving flowering shrub blooms heavily throughout the warm season and can flower nearly year round in warmer climates. Its airy, naturally mounding growth adds softness and color to the landscape, while the flowers attract butterflies and other pollinators. Thryallis grows best in full sun and well drained soil and becomes moderately drought tolerant once established, making it a beautiful choice for garden beds, borders, mass plantings, foundation plantings, and sunny tropical landscapes.

SHOP BY SIZE:

8.7"

plant tips

  • water

    Water regularly until established, then reduce to occasional watering as needed. Once mature, Thryallis is quite drought tolerant — avoid overwatering which can cause root issues.

  • light

    Full sun lover — needs at least 6 hours of direct sunlight daily for the most abundant blooms. In shady spots it will grow leggy and produce far fewer flowers.

  • zone

    9 and above.

  • mature size

    Approx. 72" W × 96" H

care

Plant in well-draining soil in a sunny spot and water regularly until established. Feed with a balanced fertilizer in spring and summer to keep blooms coming strong. Prune lightly after each bloom cycle to maintain a neat, full shape and prevent legginess. Its delicate yellow flowers and sweet light fragrance make it a beautiful addition along walkways, borders, or as a colorful complement to taller privacy hedges.

decor inspo

  • garden color mix and match

    Pair Thryallis with purple-flowering shrubs for a stunning golden and purple color combination that lights up any sunny landscape all season long.

  • walkway glow

    Plant Thryallis along a sunny walkway or garden border for a cheerful, golden display of star-shaped flowers that blooms almost year-round.
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