When does Carolina horsenettle bloom in Maryland?

Most often in June. Across 276 dated, research-grade observations of Solanum carolinense in Maryland, the flowering season runs roughly May to August.

Peak June In flower 276 Examined 458 State Maryland

Flowering 276 in flower of 458 examined

91%

95%

92%

81%

47%

10%

Proportion of examined Solanum carolinense in Maryland in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	0	6	0%	0% to 39%
Feb	0	10	0%	0% to 28%
Mar	0	16	0%	0% to 19%
Apr	0	9	0%	0% to 30%
May	10	11	91%	62% to 98%
Jun	127	134	95%	90% to 97%
Jul	58	63	92%	83% to 97%
Aug	57	70	81%	71% to 89%
Sep	18	38	47%	32% to 63%
Oct	6	61	10%	5% to 20%
Nov	0	26	0%	0% to 13%
Dec	0	14	0%	0% to 22%

Peak flowering in Jun. Each bar is the share of Solanum carolinense in Maryland 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. 276 of 458 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 Maryland found Solanum carolinense in flower, not a forecast. It is computed only from observations made in Maryland, 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

Solanum carolinense

Carolina horsenettle

Sourcesevery claim on this page

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