Green Antelopehorns (Asclepias viridis) is in the Dogbane Family family (Apocynaceae). Across the U.S., iNaturalist users have logged 4,127 research-grade flowering observations of it in our sample, peaking in May.
Nationally it blooms mainly from April to May, but timing varies a lot by state and elevation — see the table below.
When to photograph Green Antelopehorns: observations by month (U.S.)
About Green Antelopehorns
Asclepias viridis is a species of milkweed, a plant in the dogbane family known by the common names green milkweed, green antelopehorn and spider milkweed. The Latin word viridis means green. The plant is native to the midwestern, south central and southeastern United States, as well as to the southeastern portion of the western United States.From Wikipedia via iNaturalist — article, CC BY-SA.
Green Antelopehorns by state
| State | Observations | Peak month | Main season |
|---|---|---|---|
| Texas | 1,744 | April | Apr–May |
| Oklahoma | 1,434 | May | May–Jun |
| Mississippi | 176 | May | Apr–May |
| Kansas | 142 | May | May–May |
| Arkansas | 120 | May | Apr–May |
| Alabama | 111 | April | Apr–May |
| Georgia | 92 | May | May–May |
| Missouri | 91 | May | May–May |
| Kentucky | 80 | May | May–May |
| Florida | 48 | March | Feb–Apr |
| Louisiana | 34 | April | Apr–May |
| Ohio | 24 | May | May–Jun |
| Tennessee | 18 | May | May–May |
| Nebraska | 11 | May | May–May |
Main season = months with at least 30% of the state's peak-month count.
Related wildflowers (Dogbane Family)
Butterfly Milkweed
Common Milkweed
Lesser Periwinkle
Swamp Milkweed
Showy Milkweed
Narrowleaf Milkweed
Spreading Dogbane
Greater Periwinkle
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 Green Antelopehorns?
Nationally, May has the most observations, with the main season from April to May.
Where is Green Antelopehorns most often seen?
The most observations come from Texas, Oklahoma, Mississippi.