When does turpentinebroom bloom in Nevada?

Most often in February. Across 151 dated, research-grade observations of Thamnosma montana in Nevada, the flowering season runs roughly February to March.

Peak February In flower 151 Examined 245 State Nevada

Flowering 151 in flower of 245 examined

73%

93%

92%

49%

19%

36%

Proportion of examined Thamnosma montana in Nevada in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	16	22	73%	52% to 87%
Feb	55	59	93%	84% to 97%
Mar	33	36	92%	78% to 97%
Apr	39	79	49%	39% to 60%
May	4	21	19%	8% to 40%
Jun	0	2	too few examined
Jul	0	1	too few examined
Aug	0	2	too few examined
Sep	0	2	too few examined
Oct	0	5	0%	0% to 43%
Nov	0	5	0%	0% to 43%
Dec	4	11	36%	15% to 65%

Peak flowering in Feb. Each bar is the share of Thamnosma montana 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. 151 of 245 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 4 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 Thamnosma montana 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

Thamnosma montana

turpentinebroom

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.