North America Non-native Plant

Woolly Blackberry

Botanical name: Rubus tomentosus var. tomentosus

USDA symbol: RUTOT2

Native status: Not native but doesn't reproduce and persist in the wild

Woolly Blackberry: A Mystery Plant Worth Investigating Meet the woolly blackberry (Rubus tomentosus var. tomentosus), a plant that’s as intriguing as it is elusive. If you’ve stumbled across this botanical name in your gardening research, you’re likely wondering what exactly this plant is and whether it belongs in your garden. ...

Woolly Blackberry: A Mystery Plant Worth Investigating

Meet the woolly blackberry (Rubus tomentosus var. tomentosus), a plant that’s as intriguing as it is elusive. If you’ve stumbled across this botanical name in your gardening research, you’re likely wondering what exactly this plant is and whether it belongs in your garden. Let’s explore what we know about this mysterious member of the Rubus family.

What Is Woolly Blackberry?

Woolly blackberry belongs to the genus Rubus, which includes raspberries, blackberries, and their many relatives. The name tomentosus refers to the fuzzy, woolly texture of the plant’s leaves and stems – a characteristic that gives this variety its common name. Like other members of the blackberry family, this plant is a dicot, meaning it produces flowers and fruits rather than spores.

The Information Gap Problem

Here’s where things get interesting (and a bit frustrating for curious gardeners): specific information about Rubus tomentosus var. tomentosus is surprisingly scarce. This could mean several things:

  • It may be a rarely cultivated or studied variety
  • It could be regionally specific with limited documentation
  • The plant might be better known by other names or classifications

Unfortunately, we don’t have reliable information about its native range, exact growing requirements, or garden performance.

Should You Plant It?

Without knowing the native status, invasive potential, or specific growing requirements of this variety, it’s difficult to make a solid recommendation. Here’s what we suggest:

  • If you’re considering this plant, research local native Rubus species instead
  • Contact your local extension office or native plant society for regional alternatives
  • Consider well-documented native blackberry species that provide known wildlife and pollinator benefits

Better-Known Native Alternatives

Rather than gambling on a plant with limited information, consider these well-documented native blackberry options:

  • Look for native Rubus species specific to your region
  • Research locally recommended varieties through your state’s native plant resources
  • Choose plants with documented wildlife and pollinator benefits

The Bottom Line

While woolly blackberry sounds like it could be a wonderful addition to a native garden, the lack of specific information makes it a risky choice. When it comes to native gardening, it’s always better to choose plants with well-documented benefits, known growing requirements, and confirmed native status in your area.

If you’re passionate about exploring lesser-known native plants, work with reputable native plant nurseries and botanical experts who can guide you toward species that will truly benefit your local ecosystem – and actually thrive in your garden!

Woolly Blackberry

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Rosales

Family

Rosaceae Juss. - Rose family

Genus

Rubus L. - blackberry

Species

Rubus tomentosus Borkh. - woolly blackberry

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA