When does lilac tasselflower bloom in Florida?

Most often in August. Across 235 dated, research-grade observations of Emilia sonchifolia in Florida, the flowering season runs roughly January to December.

Peak August In flower 235 Examined 255 State Florida

Flowering 235 in flower of 255 examined

98%

90%

84%

90%

81%

82%

80%

100%

83%

90%

100%

Proportion of examined Emilia sonchifolia in Florida in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	53	54	98%	90% to 100%
Feb	28	31	90%	75% to 97%
Mar	21	25	84%	65% to 94%
Apr	19	21	90%	71% to 97%
May	22	27	81%	63% to 92%
Jun	9	11	82%	52% to 95%
Jul	4	5	80%	38% to 96%
Aug	7	7	100%	65% to 100%
Sep	5	6	83%	44% to 97%
Oct	9	10	90%	60% to 98%
Nov	22	22	100%	85% to 100%
Dec	36	36	100%	90% to 100%

Peak flowering in Aug. Each bar is the share of Emilia sonchifolia 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. 235 of 255 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 Emilia sonchifolia 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

Emilia sonchifolia

lilac tasselflower

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.