When does beach naupaka bloom in Hawaii?

Most often in May. Across 116 dated, research-grade observations of Scaevola taccada in Hawaii, the flowering season runs roughly April to May.

Peak May In flower 116 Examined 177 State Hawaii

Flowering 116 in flower of 177 examined

59%

35%

50%

89%

100%

69%

75%

67%

59%

77%

63%

53%

Proportion of examined Scaevola taccada in Hawaii in flower, by month
Month	In flower	Examined	Share	95% interval
Jan	10	17	59%	36% to 78%
Feb	6	17	35%	17% to 59%
Mar	6	12	50%	25% to 75%
Apr	8	9	89%	56% to 98%
May	17	17	100%	82% to 100%
Jun	9	13	69%	42% to 87%
Jul	6	8	75%	41% to 93%
Aug	8	12	67%	39% to 86%
Sep	10	17	59%	36% to 78%
Oct	17	22	77%	57% to 90%
Nov	10	16	63%	39% to 82%
Dec	9	17	53%	31% to 74%

Peak flowering in May. Each bar is the share of Scaevola taccada in Hawaii 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. 116 of 177 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 Hawaii found Scaevola taccada in flower, not a forecast. It is computed only from observations made in Hawaii, 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

Scaevola taccada

beach naupaka

Sourcesevery claim on this page

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