Whorled Loosestrife (Lysimachia quadrifolia) is in the primrose family family (Primulaceae). Across the U.S., iNaturalist users have logged 2,087 research-grade flowering observations of it in our sample, peaking in June.
Nationally it blooms mainly from June to July, but timing varies a lot by state and elevation — see the table below.
When to photograph Whorled Loosestrife: observations by month (U.S.)
About Whorled Loosestrife
Lysimachia quadrifolia, the whorled loosestrife, whorled yellow loosestrife, or crosswort, is a species of herbaceous plant in the family Primulaceae. It native to the eastern United States and Canada.From Wikipedia via iNaturalist — article, CC BY-SA.
Whorled Loosestrife by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| Massachusetts | 350 | June | Jun–Jun |
| North Carolina | 288 | June | Jun–Jul |
| New York | 270 | June | Jun–Jun |
| Maine | 197 | July | Jun–Jul |
| New Hampshire | 125 | June | Jun–Jul |
| Pennsylvania | 120 | June | Jun–Jun |
| Vermont | 117 | June | Jun–Jul |
| Wisconsin | 110 | June | Jun–Jul |
| Virginia | 85 | June | May–Jul |
| Connecticut | 75 | June | Jun–Jun |
| Tennessee | 54 | May | May–Jun |
| Kentucky | 49 | May | May–Jun |
| Maryland | 42 | June | Jun–Jun |
| Ohio | 41 | June | Jun–Jun |
| New Jersey | 37 | June | Jun–Jun |
| West Virginia | 27 | June | Jun–Jun |
| Rhode Island | 25 | June | Jun–Jul |
| Georgia | 23 | May | May–May |
| Indiana | 15 | May | May–Jun |
| Alabama | 14 | May | May–May |
| Michigan | 12 | June | Jun–Jul |
| South Carolina | 7 | May | May–Jun |
Main season = months with at least 30% of the state's peak-month count.
Related wildflowers (primrose family)
Northern Starflower
Scarlet Pimpernel
Henderson's shooting star
Fringed Loosestrife
Western Starflower
Eastern Shooting Star
Swamp Candles
Padre's Shooting Star
Photography tips
- Photograph flowers on calm, overcast mornings to avoid wind blur and harsh shadows.
- Get low: a shallow depth of field (f/2.8–f/5.6) isolates a bloom against soft color.
- Stay on trails — trampling meadows kills plants and ruins next year's display.
- Try a kaleidoscope abstract of a single bloom with our online kaleidoscope tool.
FAQ
When is the best time to photograph Whorled Loosestrife?
Nationally, June has the most observations, with the main season from June to July.
Where is Whorled Loosestrife most often seen?
The most observations come from Massachusetts, North Carolina, New York.