Blackberry (Rubus)

Rubus is a large genus in the rose family that includes blackberries, dewberries, and raspberries. Its species range from upright canes to arching or trailing brambles, so mature size, fruiting season, and pruning needs vary widely. ## Growing For cultivated blackberries, choose a sunny site with fertile, well-drained soil and steady moisture while canes are growing and fruit is developing. Avoid waterlogged ground. Cane habits and fruiting schedules differ among species and cultivars; check a selected plant’s published mature size and cane habit to plan spacing and pruning. ## Garden value Rubus plants provide edible fruit, and their flowers attract pollinators while ripe berries feed birds and mammals. Species and cultivars may be used in edible gardens, hedges, or naturalized plantings, but thorniness and spread vary. The [North Carolina Extension Rubus profile](https://plants.ces.ncsu.edu/plants/rubus/) summarizes genus diversity and garden uses, while Oregon State Extension’s [home blackberry guide](https://extension.oregonstate.edu/catalog/ec-1303-growing-blackberries-your-home-garden) gives practical soil and water guidance for cultivated blackberries. ## Maintenance Pruning depends on whether a selected blackberry fruits on first-year or second-year canes. Identify the fruiting habit before removing canes, and provide support for varieties that arch or trail. ## Montana MSU — April 2022 source The [Fire-Resistant Plants for Montana Landscapes guide](https://extension-store.montana.edu/montguides/fire-resistant-plants-for-montana-landscapes) lists Rubus spp. (Raspberry) in its shrubs table. This is the corresponding genus record; the entry does not establish individual assessment of every species or cultivar. Some source observations concern a single unnamed cultivar, and not all listed plants grow throughout Montana. The source's common-name qualifier is raspberry; blackberries and other forms in this broad genus record are not individually established by that row. Any plant can burn if sufficiently dry. Check local suitability, keep plants appropriately watered and spaced, and remove dead vegetation; maintain separate regional source ratings. ## Inland West — source row reconciliation PDF page 20 (printed 18), Shrubs: “Rubus spp.” / “raspberry, blackberry”. Scoped representative of the printed genus or group under Shrubs; the source does not name or individually assess every species, hybrid or cultivar. ## Inland West — 2005 source scope and care The [University of Idaho Station Bulletin 67, January 2005](https://www.uwyo.edu/barnbackyard/_files/documents/resources/mullenfire/protectinghomeswildfire.pdf) includes this taxon in its plant suggestions. The publication says the list is not exhaustive and no plant is fireproof; pruning, watering, plant condition and landscape arrangement matter more than selection alone. Choose for slope, aspect, hardiness and rainfall, and keep this association separate from numerical Idaho BLM scores and other regional ratings. Its landscape guidance describes a treated landscape extending at least 100 feet from the home, with greater distances on steep or windy sites. Separate tree crowns by 10–15 feet; keep foundation plantings low, well watered and free of dead material, eliminate ladder fuels and use separated planting groups with nonflammable breaks. Maintain irrigation, trim turf and remove dry debris. The same species can behave differently with water stress or accumulated dead growth; verify current local guidance and suitability. ## FireSmart BC — qualified printed genus / common-name scope The [FireSmart BC chart](https://firesmartbc.ca/landscaping-hub/fire-resistant-plants/) prints Rubus sp. / Raspberry (All Plants row 216). The chart qualifies this Rubus entry as Raspberry and marks its placement as requiring more research. This genus profile includes raspberries as well as blackberries; the association is limited to the source's unnamed raspberry context. It is not a verified blackberry identity or a transfer of a raspberry assessment to every Rubus. Zone Undetermined records the chart's unresolved placement; it does not establish a safe planting zone. The tag indexes this printed source entry on a genus-level catalog profile. It is not an independent test or placement recommendation for every species, hybrid or cultivar in the genus. Retain all other regional assessments separately. Follow current local spacing, irrigation, pruning and removal of dead material; no plant is fireproof.