When does red mangrove bloom in Florida?

Most often in August. Across 101 dated, research-grade observations of Rhizophora mangle in Florida, the flowering season runs roughly August.

Peak August In flower 101 Examined 329 State Florida

Flowering 101 in flower of 329 examined

44%

55%

14%

23%

12%

53%

70%

15%

43%

39%

19%

Proportion of examined Rhizophora mangle in Florida in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	14	32	44%	28% to 61%
Feb	18	33	55%	38% to 70%
Mar	5	35	14%	6% to 29%
Apr	1	37	3%	0% to 14%
May	5	22	23%	10% to 43%
Jun	3	25	12%	4% to 30%
Jul	10	19	53%	32% to 73%
Aug	16	23	70%	49% to 84%
Sep	4	26	15%	6% to 34%
Oct	10	23	43%	26% to 63%
Nov	9	23	39%	22% to 59%
Dec	6	31	19%	9% to 36%

Peak flowering in Aug. Each bar is the share of Rhizophora mangle 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. 101 of 329 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 Florida found Rhizophora mangle 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

Rhizophora mangle

red mangrove

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.