Index / Search / Oenothera caespitosa
§1 Plant — species · Onagraceae
Oenothera caespitosa Nutt.
vernacular tufted evening primrose
§2Habit & range
Habit and range
- Growth habit
- Forb/herb, Subshrub
- Duration
- Perennial
- Group
- Dicot
- Family
- Onagraceae Juss.
- Genus
- Oenothera
§2a
Native status, by region
- CAN Canada Native
- L48 Lower 48 States Native
§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- High
- Shade
- High
- Moisture use
- Low
- Fire
- Medium
- Salinity
- Medium
- Anaerobic
- None
- CaCO₃
- High
- Hedging
- Medium
§3b
Climate & soil
- Cold tolerance
- -13 °F minimum
- Frost-free days
- 140 min.
- Precipitation
- 7–69 in/yr
- pH range
- 6.5–8
- Root depth
- 6 in min.
- Fertility need
- Low
- Soil texture
- coarse, medium
§3c
Form & growth
- Growth form
- Single Crown
- Growth rate
- Rapid
- Lifespan
- Short
- Mature height
- 0.5 ft
- Foliage texture
- Medium
- Foliage colour
- Green
- Porosity (summer)
- Porous
- Porosity (winter)
- Porous
- Flower colour
- White
- Fruit colour
- Brown
- Fire resistant
- No
- N fixation
- None
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Late Spring
- Seed abundance
- High
- Seed begins
- Summer
- Seed ends
- Fall
- Spread rate
- Rapid
- Stratify
- Yes
- Seeds / lb
- 1,300,000
- Propagation
- seed, container
§3e
Use & availability
- Commercial availability
- Contracting Only
- Nursery stock
- Yes
- Browse palatability
- Medium
- Graze palatability
- Medium
- Palatable, human
- No
- Protein potential
- Medium
- Lumber
- No
- Christmas tree
- No
§4Montana distribution
Recorded in 34 of 56 Montana counties.
Native · 34 counties
- Beaverhead 30001
- Carbon 30009
- Carter 30011
- Cascade 30013
- Chouteau 30015
- Custer 30017
- Dawson 30021
- Fergus 30027
- Gallatin 30031
- Garfield 30033
- Glacier 30035
- Golden Valley 30037
- Lewis and Clark 30049
- Liberty 30051
- Madison 30057
- McCone 30055
- Meagher 30059
- Missoula 30063
- Musselshell 30065
- Park 30067
- Petroleum 30069
- Phillips 30071
- Powder River 30075
- Powell 30077
- Roosevelt 30085
- Rosebud 30087
- Sheridan 30091
- Stillwater 30095
- Sweet Grass 30097
- Teton 30099
- Toole 30101
- Valley 30105
- Wheatland 30107
- Yellowstone 30111
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/OECA10 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/7223887 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-25
fetched 2026-05-25T16:28:53Z