Index / Search / Agoseris grandiflora
§1 Plant
Agoseris grandiflora (Nutt.) Greene
vernacular bigflower agoseris — species · Asteraceae
§2Habit & range
Habit and range
- Growth habit
- Forb/herb
- Duration
- Perennial
- Group
- Dicot
- Family
- Asteraceae Bercht. & J. Presl
- Genus
- Agoseris
§2a
Native status, by region
- CAN Canada Native
- L48 Lower 48 States Native
§2b
County-level range
· 123 counties across 7 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- Medium
- Shade
- High
- Moisture use
- Medium
- Fire
- High
- Salinity
- None
- Anaerobic
- Low
- CaCO₃
- Medium
- Hedging
- None
§3b
Climate & soil
- Cold tolerance
- -13 °F minimum
- Frost-free days
- 120 min.
- Precipitation
- 12–20 in/yr
- pH range
- 5.8–7.3
- Root depth
- 8 in min.
- Fertility need
- Medium
- Soil texture
- coarse, medium, fine
§3c
Form & growth
- Growth form
- Single Crown
- Growth rate
- Moderate
- Lifespan
- Short
- Mature height
- 1.8 ft
- Foliage texture
- Coarse
- Foliage colour
- Green
- Porosity (summer)
- Porous
- Porosity (winter)
- Porous
- Flower colour
- Yellow
- Fruit colour
- Brown
- Fire resistant
- No
- N fixation
- None
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Spring
- Seed abundance
- Medium
- Seed begins
- Summer
- Seed ends
- Summer
- Spread rate
- Moderate
- Stratify
- No
- Seeds / lb
- 273,665
- Propagation
- seed
§3e
Use & availability
- Commercial availability
- No Known Source
- Nursery stock
- No
- Browse palatability
- Low
- Graze palatability
- Low
- Palatable, human
- No
- Protein potential
- Low
- Lumber
- No
- Christmas tree
- No
§4Counties, by state
Recorded in 123 counties across 7 states/territories.
California view state ↗ 45 N ▾
- Alameda 06001
- Amador 06005
- Butte 06007
- Calaveras 06009
- Colusa 06011
- Contra Costa 06013
- Del Norte 06015
- El Dorado 06017
- Glenn 06021
- Humboldt 06023
- Kern 06029
- Lake 06033
- Lassen 06035
- Los Angeles 06037
- Madera 06039
- Marin 06041
- Mariposa 06043
- Mendocino 06045
- Modoc 06049
- Monterey 06053
- Napa 06055
- Nevada 06057
- Orange 06059
- Placer 06061
- Plumas 06063
- Riverside 06065
- Sacramento 06067
- San Benito 06069
- San Bernardino 06071
- San Diego 06073
- San Francisco 06075
- San Luis Obispo 06079
- San Mateo 06081
- Santa Barbara 06083
- Santa Clara 06085
- Santa Cruz 06087
- Shasta 06089
- Sierra 06091
- Siskiyou 06093
- Solano 06095
- Sonoma 06097
- Trinity 06105
- Tulare 06107
- Tuolumne 06109
- Ventura 06111
Idaho view state ↗ 17 N ▾
Montana view state ↗ 1 N ▾
Nevada view state ↗ 7 N ▾
Oregon view state ↗ 29 N ▾
- Benton 41003
- Clackamas 41005
- Clatsop 41007
- Columbia 41009
- Coos 41011
- Crook 41013
- Curry 41015
- Douglas 41019
- Grant 41023
- Harney 41025
- Hood River 41027
- Jackson 41029
- Jefferson 41031
- Josephine 41033
- Klamath 41035
- Lane 41039
- Linn 41043
- Marion 41047
- Morrow 41049
- Multnomah 41051
- Sherman 41055
- Tillamook 41057
- Umatilla 41059
- Union 41061
- Wallowa 41063
- Wasco 41065
- Washington 41067
- Wheeler 41069
- Yamhill 41071
Utah view state ↗ 3 N ▾
Washington view state ↗ 21 N ▾
- Chelan 53007
- Clallam 53009
- Columbia 53013
- Garfield 53023
- Island 53029
- Jefferson 53031
- King 53033
- Kitsap 53035
- Kittitas 53037
- Klickitat 53039
- Lewis 53041
- Mason 53045
- Pend Oreille 53051
- Pierce 53053
- San Juan 53055
- Skamania 53059
- Spokane 53063
- Stevens 53065
- Thurston 53067
- Walla Walla 53071
- Whitman 53075
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/AGGR ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/3092909 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T20:46:58Z