When does white clover bloom in North Carolina?

Most often in September. Across 426 dated, research-grade observations of Trifolium repens in North Carolina, the flowering season runs roughly March to September.

Peak September In flower 426 Examined 602 State North Carolina

Flowering 426 in flower of 602 examined

14%

22%

70%

80%

77%

82%

63%

88%

62%

41%

44%

Proportion of examined Trifolium repens in North Carolina in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	1	7	14%	3% to 51%
Feb	6	27	22%	11% to 41%
Mar	45	64	70%	58% to 80%
Apr	94	118	80%	72% to 86%
May	82	103	80%	71% to 86%
Jun	70	91	77%	67% to 84%
Jul	32	39	82%	67% to 91%
Aug	15	24	63%	43% to 79%
Sep	28	32	88%	72% to 95%
Oct	38	61	62%	50% to 73%
Nov	11	27	41%	25% to 59%
Dec	4	9	44%	19% to 73%

Peak flowering in Sep. Each bar is the share of Trifolium repens in North Carolina 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. 426 of 602 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 North Carolina found Trifolium repens in flower, not a forecast. It is computed only from observations made in North Carolina, 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

Trifolium repens

white clover

Sourcesevery claim on this page

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