When does Yellow Sand Verbena bloom in California?

Most often in May. Across 571 dated, research-grade observations of Abronia latifolia in California, the flowering season runs roughly February to December.

Peak May In flower 571 Examined 600 State California

Flowering 571 in flower of 600 examined

64%

80%

78%

96%

100%

99%

98%

100%

92%

90%

89%

Proportion of examined Abronia latifolia in California in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	7	11	64%	35% to 85%
Feb	8	10	80%	49% to 94%
Mar	21	27	78%	59% to 89%
Apr	51	53	96%	87% to 99%
May	93	93	100%	96% to 100%
Jun	118	119	99%	95% to 100%
Jul	85	87	98%	92% to 99%
Aug	65	65	100%	94% to 100%
Sep	59	64	92%	83% to 97%
Oct	38	42	90%	78% to 96%
Nov	18	20	90%	70% to 97%
Dec	8	9	89%	56% to 98%

Peak flowering in May. Each bar is the share of Abronia latifolia in California 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. 571 of 600 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 California found Abronia latifolia in flower, not a forecast. It is computed only from observations made in California, 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 California. 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.