When does Naked Buckwheat bloom in California?

Most often in September. Across 1,033 dated, research-grade observations of Eriogonum nudum in California, the flowering season runs roughly July to December.

Peak September In flower 1,033 Examined 1,285 State California

Flowering 1,033 in flower of 1,285 examined

52%

19%

18%

19%

39%

76%

97%

98%

96%

94%

88%

Proportion of examined Eriogonum nudum in California in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	13	25	52%	34% to 70%
Feb	4	21	19%	8% to 40%
Mar	7	39	18%	9% to 33%
Apr	16	83	19%	12% to 29%
May	33	84	39%	30% to 50%
Jun	129	170	76%	69% to 82%
Jul	265	274	97%	94% to 98%
Aug	213	220	97%	94% to 98%
Sep	171	175	98%	94% to 99%
Oct	96	100	96%	90% to 98%
Nov	58	62	94%	85% to 97%
Dec	28	32	88%	72% to 95%

Peak flowering in Sep. Each bar is the share of Eriogonum nudum 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. 1,033 of 1,285 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 nudum 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 nudum

Naked 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.