When does sorrelvine bloom in Texas?

Most often in August. Across 63 dated, research-grade observations of Cissus trifoliata in Texas, the flowering season runs roughly June to August.

Peak August In flower 63 Examined 414 State Texas

Flowering 63 in flower of 414 examined

17%

14%

13%

27%

23%

30%

10%

Proportion of examined Cissus trifoliata in Texas in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	1	6	17%	3% to 56%
Feb	0	0	too few examined
Mar	0	5	0%	0% to 43%
Apr	10	70	14%	8% to 24%
May	6	47	13%	6% to 25%
Jun	16	60	27%	17% to 39%
Jul	10	43	23%	13% to 38%
Aug	13	44	30%	18% to 44%
Sep	5	50	10%	4% to 21%
Oct	2	59	3%	1% to 12%
Nov	0	19	0%	0% to 17%
Dec	0	11	0%	0% to 26%

Peak flowering in Aug. Each bar is the share of Cissus trifoliata 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. 63 of 414 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. One month has fewer than 5 examined observations, so no proportion is drawn for it. 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 Cissus trifoliata 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

Cissus trifoliata

sorrelvine

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.