When does Brittlebush bloom in Nevada?

Most often in April. Across 286 dated, research-grade observations of Encelia farinosa in Nevada, the flowering season runs roughly January to April.

Peak April In flower 286 Examined 423 State Nevada

Flowering 286 in flower of 423 examined

72%

74%

79%

87%

20%

11%

20%

64%

41%

Proportion of examined Encelia farinosa in Nevada in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	33	46	72%	57% to 83%
Feb	37	50	74%	60% to 84%
Mar	105	133	79%	71% to 85%
Apr	73	84	87%	78% to 93%
May	4	20	20%	8% to 42%
Jun	1	9	11%	2% to 44%
Jul	0	1	too few examined
Aug	1	4	too few examined
Sep	1	5	20%	4% to 62%
Oct	0	11	0%	0% to 26%
Nov	18	28	64%	46% to 79%
Dec	13	32	41%	26% to 58%

Peak flowering in Apr. Each bar is the share of Encelia farinosa in Nevada 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. 286 of 423 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 2 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 Nevada found Encelia farinosa in flower, not a forecast. It is computed only from observations made in Nevada, 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

Encelia farinosa

Brittlebush

Sourcesevery claim on this page

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