Skill Level: Beginner
Zephyranthes tubispathus, commonly called the Copper Rain Lily, is a small bulb native to seasonally dry grasslands of South America, especially Argentina and Uruguay. It thrives in well‑drained sandy or loamy soils, full sun to light shade, and is generally hardy to about USDA Zone 7–8. Plants reach 8–12 inches tall, with narrow, grassy foliage and warm copper‑gold flowers that appear in sudden flushes after rainfall — the bulbs respond quickly to moisture, often pushing up blooms almost overnight.
Blooming begins in late spring and continues through summer, with each flush triggered by natural or artificial rain. In cooler coastal climates, expect the first flowers in late May or June, followed by repeat bloom whenever moisture arrives.
The bulbs enter their primary dormancy during the dry season in their native habitat, and again in winter in cooler climates. They do not have an additional dormancy beyond these normal cycles; if kept evenly moist in summer, some plants may remain in light growth rather than going fully dormant.
Our Seed Germination Experience
Seeds have a high germination rate when planted fresh, preferably within 12 months of harvest. Expect germination within 10 days when exposed to room temperature.
Seed grown bulbs may bloom within 12 months, but 2 years is more likely.