When does Texas lignum-vitae bloom in Texas?

Most often in March. Across 473 dated, research-grade observations of Porlieria angustifolia in Texas, the flowering season runs roughly March to April.

Peak March In flower 473 Examined 813 State Texas

Flowering 473 in flower of 813 examined

25%

71%

97%

85%

64%

50%

Proportion of examined Porlieria angustifolia in Texas in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	3	12	25%	9% to 53%
Feb	12	17	71%	47% to 87%
Mar	257	264	97%	95% to 99%
Apr	168	198	85%	79% to 89%
May	16	25	64%	45% to 80%
Jun	4	8	50%	22% to 78%
Jul	1	4	too few examined
Aug	2	22	9%	3% to 28%
Sep	1	42	2%	0% to 12%
Oct	5	107	5%	2% to 10%
Nov	4	86	5%	2% to 11%
Dec	0	28	0%	0% to 12%

Peak flowering in Mar. Each bar is the share of Porlieria angustifolia 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. 473 of 813 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 Porlieria angustifolia 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

Porlieria angustifolia

Texas lignum-vitae

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.