When does littleleaf ratany bloom in California?

Most often in April. Across 380 dated, research-grade observations of Krameria erecta in California, the flowering season runs roughly March to May.

Peak April In flower 380 Examined 500 State California

Flowering 380 in flower of 500 examined

38%

43%

80%

95%

93%

75%

69%

72%

65%

40%

Proportion of examined Krameria erecta in California in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	10	26	38%	22% to 57%
Feb	16	37	43%	29% to 59%
Mar	55	69	80%	69% to 88%
Apr	103	109	95%	89% to 97%
May	91	98	93%	86% to 97%
Jun	9	12	75%	47% to 91%
Jul	0	1	too few examined
Aug	4	4	too few examined
Sep	11	16	69%	44% to 86%
Oct	41	57	72%	59% to 82%
Nov	30	46	65%	51% to 77%
Dec	10	25	40%	23% to 59%

Peak flowering in Apr. Each bar is the share of Krameria erecta 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. 380 of 500 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 California found Krameria erecta 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

Krameria erecta

littleleaf ratany

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.