Rubus argutus
naturalizedRosaceae

Rubus argutus

Sawtooth Blackberry

Naturalized (non-native)non-native

Introduced and now reproducing on its own in the wild.

Rubus argutus is a North American species of prickly bramble in the rose family. It is a perennial native to the eastern and south-central United States from Florida to Texas, Missouri, Illinois, and Maine. Common names are sawtooth blackberry or tall blackberry because of its habit of growing up to 2 meters (80 inches) in height.

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summary via Wikipedia · CC BY-SA
Seasonality
22 flowering · 8 fruiting annotations · iNaturalist · fetched Jul 2026
JFMAMJJASONDpeak
■ flowering (peak February)■ fruiting (peak February)

This is an inference, not a schedule. The curve reflects when observers annotated flowering and fruiting — which tracks observer effort as well as plant behavior, and pools all elevations and islands into one signal. Hawaiʻi’s microclimates vary enormously; a species may fruit in January at sea level and June at elevation. Use this to know when to look, then look.

What works

Controlling Rubus argutus

From Weed Control by Species5 rows →

Best reported: foliar with 5% milestone — one report from NEPM.

  1. 5.0foliar5% milestoneAminopyralidG41 report
    NEPM
    • 5successful. Recommended method · NEPM
  2. 4.0cut-stump25% G4, 1% Milestone, Crop oil dilutionTriclopyrG4AminopyralidG41 report
    NEPM
    • 4more than moderate satisfaction · NEPM
  3. 3.0clip and drip40% G4, 80% BiodieselTriclopyrG41 report · 1 observed
    OANRP
    • 3moderate satisfaction · OANRP · observed · 2015-02-23

      Somewhat effective. Still requires multiple treatments

      Habitat: mesic
  4. 3.0dignone1 report · 1 observed
    OANRP
    • 3moderate satisfaction · OANRP · observed

      Digging up rhizomes with incipient infestations. Time-consuming

      Habitat: mesic
  5. 1.0clip and drip20% G4, 80% BiodieselTriclopyrG41 report · 1 observed
    OANRP
    • 1unsatisfactory results · OANRP · observed

      Constant resprouts. Very discouraging. If root network is big, this is not effective.

      Habitat: mesic

Ratings are the reporting organisation’s own, on a 5-point scale. Always follow the product label — the label is the law. See these 5 rows in the full table

Gallery · 6 · iNaturalist
open-licensed photos · click any to view its source
Where documented · 38 ahupuaʻa
documented occurrences · iNaturalist + GBIF · iNaturalist 200 · GBIF 262 records
Waimea · KauaʻiiNat 62 · GBIF 71 ✓
Keauhou · HawaiʻiiNat 46 · GBIF 62 ✓
Kalalau · KauaʻiiNat 29 · GBIF 24 ✓
Honopū · KauaʻiiNat 9 · GBIF 12 ✓
Pāpaʻikou · HawaiʻiiNat 7 · GBIF 11 ✓
Humuʻula · HawaiʻiiNat 6 · GBIF 11 ✓
Kalialinui · MauiiNat 9 · GBIF 8 ✓
Mākaha · OʻahuiNat 5 · GBIF 9 ✓
Hakalau · HawaiʻiiNat 4 · GBIF 4 ✓
Kahuku · HawaiʻiiNat 4 · GBIF 4 ✓
Makawao · MauiiNat 2 · GBIF 5 ✓
Waiʻanae · OʻahuiNat 3 · GBIF 3 ✓
ʻĀpua · HawaiʻiiNat 2 · GBIF 2 ✓
Keaʻau · HawaiʻiiNat 1 · GBIF 3 ✓
Kaʻohe Mauka · HawaiʻiiNat 1 · GBIF 1 ✓
Kahanahāiki · OʻahuiNat 1 · GBIF 1 ✓
Wainiha · KauaʻiiNat 1 · GBIF 1 ✓
Pūlehuiki · MauiiNat 1 · GBIF 1 ✓
Paukaʻa · HawaiʻiiNat 1 · GBIF 1 ✓
Pūlehunui · MauiiNat 1 · GBIF 1 ✓
Kalihi · OʻahuiNat 1 · GBIF 1 ✓