When does ground-ivy bloom in West Virginia?

Most often in May. Across 133 dated, research-grade observations of Glechoma hederacea in West Virginia, the flowering season runs roughly April to May.

Peak May In flower 133 Examined 193 State West Virginia

Flowering 133 in flower of 193 examined

70%

99%

100%

20%

Proportion of examined Glechoma hederacea in West Virginia in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	6	0%	0% to 39%
Feb	0	5	0%	0% to 43%
Mar	26	37	70%	54% to 83%
Apr	82	83	99%	93% to 100%
May	23	23	100%	86% to 100%
Jun	2	10	20%	6% to 51%
Jul	0	5	0%	0% to 43%
Aug	0	2	too few examined
Sep	0	3	too few examined
Oct	0	7	0%	0% to 35%
Nov	0	3	too few examined
Dec	0	9	0%	0% to 30%

Peak flowering in May. Each bar is the share of Glechoma hederacea in West Virginia 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. 133 of 193 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 3 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 West Virginia found Glechoma hederacea in flower, not a forecast. It is computed only from observations made in West Virginia, 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

Glechoma hederacea

ground-ivy

Sourcesevery claim on this page

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