When does Drummond's rain lily bloom in Texas?

Most often in June. Across 2,170 dated, research-grade observations of Zephyranthes drummondii in Texas, the flowering season runs roughly March to November.

Peak June In flower 2,170 Examined 2,265 State Texas

Flowering 2,170 in flower of 2,265 examined

92%

97%

100%

98%

89%

97%

90%

33%

Proportion of examined Zephyranthes drummondii in Texas in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	1	1	too few examined
Feb	0	2	too few examined
Mar	329	358	92%	89% to 94%
Apr	1372	1416	97%	96% to 98%
May	279	287	97%	95% to 99%
Jun	30	30	100%	89% to 100%
Jul	33	33	100%	90% to 100%
Aug	44	45	98%	88% to 100%
Sep	40	45	89%	77% to 95%
Oct	31	32	97%	84% to 99%
Nov	9	10	90%	60% to 98%
Dec	2	6	33%	10% to 70%

Peak flowering in Jun. Each bar is the share of Zephyranthes drummondii in Texas observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 2,170 of 2,265 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 2 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.wt38fd.

What this is, and what it is not

This is a record of when people in Texas found Zephyranthes drummondii in flower, not a forecast. It is computed only from observations made in Texas, so it is not the species’ global average dragged onto a map: the same plant flowers on different dates in different places, and that is the entire point of the page.

It will not tell you what your particular plant will do this year. Bloom time moves with the season, with altitude, and with the weather, and a warm February pulls everything forward. We publish the distribution and the sample size, and we refuse to draw a month that too few people examined.

The plant

Zephyranthes drummondii

Drummond's rain lily

Sourcesevery claim on this page

GBIF (iNaturalist Research-grade Observations). Dated flowering annotations in Texas. Every record achieved iNaturalist quality grade Research, which is applied upstream at export. 10.15468/dl.wt38fd. Retrieved 2026-07-14.
World Flora Online Plant List. The accepted name. CC0. Retrieved 2026-07-12.