When does Texas bindweed bloom in Texas?

Most often in September. Across 1,286 dated, research-grade observations of Convolvulus equitans in Texas, the flowering season runs roughly March to October.

Peak September In flower 1,286 Examined 1,356 State Texas

Flowering 1,286 in flower of 1,356 examined

96%

95%

94%

96%

97%

94%

75%

67%

Proportion of examined Convolvulus equitans in Texas in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	2	too few examined
Feb	1	1	too few examined
Mar	55	57	96%	88% to 99%
Apr	502	521	96%	94% to 98%
May	367	386	95%	92% to 97%
Jun	150	159	94%	90% to 97%
Jul	55	57	96%	88% to 99%
Aug	44	46	96%	85% to 99%
Sep	37	38	97%	87% to 100%
Oct	44	47	94%	83% to 98%
Nov	27	36	75%	59% to 86%
Dec	4	6	67%	30% to 90%

Peak flowering in Sep. Each bar is the share of Convolvulus equitans 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. 1,286 of 1,356 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 Convolvulus equitans 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

Convolvulus equitans

Texas bindweed

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.