Index / Search / Rubus alumnus
§1 Plant
Rubus alumnus L.H. Bailey
vernacular oldfield blackberry — species · Rosaceae
§2Habit & range
Habit and range
- Growth habit
- Subshrub
- Duration
- Perennial
- Group
- Dicot
- Family
- Rosaceae Juss.
- Genus
- Rubus
§2a
Native status, by region
- L48 Lower 48 States Native
§2b
County-level range
· 82 counties across 9 states/territories§3Cultivation specs · USDA
Recorded by the USDA Plant Materials Program.
§3a
Tolerances
- Drought
- Medium
- Shade
- Medium
- Moisture use
- Medium
- Fire
- High
- Salinity
- None
- Anaerobic
- None
- CaCO₃
- Medium
- Hedging
- None
§3b
Climate & soil
- Cold tolerance
- -28 °F minimum
- Frost-free days
- 140 min.
- Precipitation
- 32–50 in/yr
- pH range
- 4.8–7
- Root depth
- 8 in min.
- Fertility need
- Medium
- Soil texture
- coarse, medium, fine
§3c
Form & growth
- Growth form
- Thicket Forming
- Growth rate
- Rapid
- Lifespan
- Moderate
- Mature height
- 5 ft
- Height @ 20 y
- 5 ft
- Foliage texture
- Medium
- Foliage colour
- Green
- Porosity (summer)
- Porous
- Porosity (winter)
- Porous
- Flower colour
- White
- Fruit colour
- Black
- Fire resistant
- No
- N fixation
- None
- Toxicity
- None
§3d
Reproduction
- Bloom period
- Mid Spring
- Seed abundance
- High
- Seed begins
- Spring
- Seed ends
- Summer
- Spread rate
- Slow
- Stratify
- Yes
- Seeds / lb
- 275,000
- Propagation
- seed, cuttings, bare root, container, sprigs
§3e
Use & availability
- Commercial availability
- No Known Source
- Nursery stock
- No
- Browse palatability
- Medium
- Graze palatability
- Medium
- Palatable, human
- Yes
- Protein potential
- Low
- Lumber
- No
- Christmas tree
- No
§4Counties, by state
Recorded in 82 counties across 9 states/territories.
District of Columbia view state ↗ 1 N ▾
Illinois view state ↗ 4 N ▾
Indiana view state ↗ 8 N ▾
Kentucky view state ↗ 15 N ▾
Minnesota view state ↗ 1 N ▾
Missouri view state ↗ 1 N ▾
Ohio view state ↗ 1 N ▾
West Virginia view state ↗ 22 N ▾
- Barbour 54001
- Berkeley 54003
- Braxton 54007
- Brooke 54009
- Fayette 54019
- Grant 54023
- Hampshire 54027
- Hardy 54031
- Jackson 54035
- Monongalia 54061
- Morgan 54065
- Nicholas 54067
- Ohio 54069
- Pleasants 54073
- Pocahontas 54075
- Preston 54077
- Raleigh 54081
- Randolph 54083
- Summers 54089
- Taylor 54091
- Webster 54101
- Wirt 54105
Wisconsin view state ↗ 29 N ▾
- Adams 55001
- Barron 55005
- Buffalo 55011
- Chippewa 55017
- Columbia 55021
- Dane 55025
- Door 55029
- Fond du Lac 55039
- Forest 55041
- Grant 55043
- Green 55045
- Green Lake 55047
- Iowa 55049
- Jefferson 55055
- La Crosse 55063
- Lafayette 55065
- Menominee 55078
- Outagamie 55087
- Ozaukee 55089
- Polk 55095
- Rock 55105
- Sauk 55111
- St. Croix 55109
- Vernon 55123
- Vilas 55125
- Walworth 55127
- Washington 55131
- Waukesha 55133
- Waupaca 55135
§5Sources & provenance
USDA PLANTS
Symbol, taxonomy, distribution, cultivation specs, native status. Public domain.
plants.usda.gov/RUAL9 ↗GBIF Backbone
Canonical taxonomic identity, synonym resolution, cross-refs. CC0.
gbif.org/species/2992616 ↗Record version
Cached and built locally. Source version on this record:
usda-plants-mt-2026-05-26
fetched 2026-05-26T14:42:51Z