Based on 2,557 research-grade iNaturalist flowering observations in California, Narrowleaf Milkweed blooms mainly from June to August, peaking in July. It ranks #66 among wildflowers recorded in the state in our data.
Asclepias fascicularis
Narrowleaf Milkweed in California by month
Bars show research-grade observations per month. They mix true seasonality with how often people are outdoors, so treat small numbers with caution.
Also in bloom in California in July
Leichtlin's Mariposa Lily
Western Columbine
California fuchsia
Laurel Sumac
Fireweed
Scarlet Monkeyflower
California Buckwheat
Anderson's thistle
Places to look in California
Botanical GardenThe Huntington Library, Art Museum, and Botanical Gardens
State ParkHearst Castle
Botanical GardenSan Francisco Botanical Garden
State ParkAnza-Borrego Desert State Park
National ForestAngeles National Forest
National ForestSequoia National Forest
FAQ
When does Narrowleaf Milkweed bloom in California?
Mainly June–August, with the most records in July.
How common is Narrowleaf Milkweed in California?
It ranks #66 by number of iNaturalist flowering observations among wildflowers in California (2,557 records in our sample).