When does Desert Trumpet bloom in California?

Most often in June. Across 845 dated, research-grade observations of Eriogonum inflatum in California, the flowering season runs roughly May to November.

Peak June In flower 845 Examined 1,649 State California

Flowering 845 in flower of 1,649 examined

43%

34%

43%

58%

71%

74%

69%

50%

62%

56%

65%

58%

Proportion of examined Eriogonum inflatum in California in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	96	221	43%	37% to 50%
Feb	78	231	34%	28% to 40%
Mar	152	357	43%	38% to 48%
Apr	131	224	58%	52% to 65%
May	91	129	71%	62% to 78%
Jun	28	38	74%	58% to 85%
Jul	18	26	69%	50% to 84%
Aug	14	28	50%	33% to 67%
Sep	31	50	62%	48% to 74%
Oct	46	82	56%	45% to 66%
Nov	66	102	65%	55% to 73%
Dec	94	161	58%	51% to 66%

Peak flowering in Jun. Each bar is the share of Eriogonum inflatum 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. 845 of 1,649 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 inflatum 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 inflatum

Desert Trumpet

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.