When does Japanese honeysuckle bloom in Texas?

Most often in May. Across 393 dated, research-grade observations of Lonicera japonica in Texas, the flowering season runs roughly April to June.

Peak May In flower 393 Examined 617 State Texas

Flowering 393 in flower of 617 examined

17%

41%

87%

90%

80%

67%

56%

39%

52%

22%

Proportion of examined Lonicera japonica in Texas in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	3	33	9%	3% to 24%
Feb	4	23	17%	7% to 37%
Mar	18	44	41%	28% to 56%
Apr	214	246	87%	82% to 91%
May	72	80	90%	81% to 95%
Jun	24	30	80%	63% to 91%
Jul	14	21	67%	45% to 83%
Aug	10	18	56%	34% to 75%
Sep	11	28	39%	24% to 58%
Oct	12	23	52%	33% to 71%
Nov	8	36	22%	12% to 38%
Dec	3	35	9%	3% to 22%

Peak flowering in May. Each bar is the share of Lonicera japonica 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. 393 of 617 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 Lonicera japonica 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

Lonicera japonica

Japanese honeysuckle

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.