When does Yellow Sand Verbena bloom in Washington?

Most often in June. Across 151 dated, research-grade observations of Abronia latifolia in Washington, the flowering season runs roughly May to August.

Peak June In flower 151 Examined 183 State Washington

Flowering 151 in flower of 183 examined

86%

100%

96%

76%

20%

Proportion of examined Abronia latifolia in Washington in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	0	too few examined
Feb	0	0	too few examined
Mar	0	1	too few examined
Apr	0	9	0%	0% to 30%
May	38	44	86%	73% to 94%
Jun	33	33	100%	90% to 100%
Jul	35	35	100%	90% to 100%
Aug	27	28	96%	82% to 99%
Sep	16	21	76%	55% to 89%
Oct	1	4	too few examined
Nov	1	5	20%	4% to 62%
Dec	0	3	too few examined

Peak flowering in Jun. Each bar is the share of Abronia latifolia in Washington 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. 151 of 183 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 5 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 Washington found Abronia latifolia in flower, not a forecast. It is computed only from observations made in Washington, 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

Abronia latifolia

Yellow Sand Verbena

Sourcesevery claim on this page

GBIF (iNaturalist Research-grade Observations). Dated flowering annotations in Washington. 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.