When does purple groundcherry bloom in Texas?

Most often in September. Across 1,560 dated, research-grade observations of Quincula lobata in Texas, the flowering season runs roughly January to December.

Peak September In flower 1,560 Examined 1,613 State Texas

Flowering 1,560 in flower of 1,613 examined

91%

96%

98%

96%

95%

93%

99%

95%

84%

85%

Proportion of examined Quincula lobata in Texas in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	10	11	91%	62% to 98%
Feb	24	25	96%	80% to 99%
Mar	231	241	96%	93% to 98%
Apr	500	511	98%	96% to 99%
May	360	366	98%	96% to 99%
Jun	155	161	96%	92% to 98%
Jul	58	61	95%	87% to 98%
Aug	41	44	93%	82% to 98%
Sep	82	83	99%	93% to 100%
Oct	56	59	95%	86% to 98%
Nov	32	38	84%	70% to 93%
Dec	11	13	85%	58% to 96%

Peak flowering in Sep. Each bar is the share of Quincula lobata in Texas 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. 1,560 of 1,613 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 Texas found Quincula lobata in flower, not a forecast. It is computed only from observations made in Texas, 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

Quincula lobata

purple groundcherry

Sourcesevery claim on this page

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