When does Blue Curls bloom in Florida?

Most often in May. Across 115 dated, research-grade observations of Trichostema dichotomum in Florida, the flowering season runs roughly May to October.

Peak May In flower 115 Examined 139 State Florida

Flowering 115 in flower of 139 examined

100%

40%

27%

93%

94%

71%

Proportion of examined Trichostema dichotomum in Florida in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	1	too few examined
Feb	0	0	too few examined
Mar	2	2	too few examined
Apr	2	3	too few examined
May	5	5	100%	57% to 100%
Jun	2	5	40%	12% to 77%
Jul	1	1	too few examined
Aug	3	11	27%	10% to 57%
Sep	41	44	93%	82% to 98%
Oct	49	52	94%	84% to 98%
Nov	10	14	71%	45% to 88%
Dec	0	1	too few examined

Peak flowering in May. Each bar is the share of Trichostema dichotomum in Florida 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. 115 of 139 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 6 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 Florida found Trichostema dichotomum in flower, not a forecast. It is computed only from observations made in Florida, 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

Trichostema dichotomum

Blue Curls

Sourcesevery claim on this page

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