Name: Galphimia glauca 'Shower of Gold' (Rain of Gold, Thryallis)

Average Landscape Size: 3–4 ft tall × 3–4 ft wide; rounded, dense habit (can reach 5–6 ft if unpruned)

Sun Requirements: Full sun to partial shade; best flowering in full sun

Water Needs: Low to moderate; extremely drought tolerant once established

Deer Resistance: High

Cold Hardiness: USDA Zones 8–11; evergreen in our area, may experience some tip damage in severe freezes

Fertilization & Pruning: Light fertilizer in spring; prune lightly in late winter to maintain shape

Detailed Description: Shower of Gold Thryallis is like having sunshine in your garden all season long! Those bright golden-yellow blooms just keep coming from spring clear through fall, and they're absolutely gorgeous against that fine-textured, evergreen foliage. Here in our area, this plant is a superstar – it loves our heat, handles drought like a champion, and the deer leave it completely alone! Most homeowners keep these around 3–4 feet, making them perfect for colorful borders or mass plantings. Once established, you can practically forget about watering it, but it'll reward you with months of brilliant yellow blooms!

Data compiled: September 2025