When does pigeonberry bloom in Texas?

Most often in May. Across 664 dated, research-grade observations of Rivina humilis in Texas, the flowering season runs roughly April to June.

Peak May In flower 664 Examined 1,060 State Texas

Flowering 664 in flower of 1,060 examined

68%

53%

77%

86%

76%

57%

64%

66%

41%

60%

42%

Proportion of examined Rivina humilis in Texas in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	25	37	68%	51% to 80%
Feb	20	38	53%	37% to 68%
Mar	19	36	53%	37% to 68%
Apr	127	166	77%	70% to 82%
May	77	90	86%	77% to 91%
Jun	66	87	76%	66% to 84%
Jul	53	93	57%	47% to 67%
Aug	49	77	64%	52% to 73%
Sep	69	105	66%	56% to 74%
Oct	58	141	41%	33% to 49%
Nov	70	117	60%	51% to 68%
Dec	31	73	42%	32% to 54%

Peak flowering in May. Each bar is the share of Rivina humilis 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. 664 of 1,060 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 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 Rivina humilis 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

Rivina humilis

pigeonberry

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.