When does Seaside Buckwheat bloom in California?

Most often in July. Across 459 dated, research-grade observations of Eriogonum latifolium in California, the flowering season runs roughly June to August.

Peak July In flower 459 Examined 599 State California

Flowering 459 in flower of 599 examined

30%

40%

29%

54%

63%

80%

97%

94%

72%

53%

50%

Proportion of examined Eriogonum latifolium in California in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	3	10	30%	11% to 60%
Feb	2	5	40%	12% to 77%
Mar	2	7	29%	8% to 64%
Apr	21	39	54%	39% to 68%
May	43	68	63%	51% to 74%
Jun	113	142	80%	72% to 85%
Jul	143	147	97%	93% to 99%
Aug	64	68	94%	86% to 98%
Sep	34	47	72%	58% to 83%
Oct	19	36	53%	37% to 68%
Nov	11	22	50%	31% to 69%
Dec	4	8	50%	22% to 78%

Peak flowering in Jul. Each bar is the share of Eriogonum latifolium 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. 459 of 599 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 Eriogonum latifolium 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

Eriogonum latifolium

Seaside Buckwheat

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.