Boysenberry 'Boysen'

Rubus ursinus

Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Rubus (ROO-bus) (Info)
Species: ursinus (ur-SEE-nus) (Info)
Cultivar: Boysen


Edible Fruits and Nuts

Vines and Climbers

Water Requirements:

Average Water Needs; Water regularly; do not overwater

Sun Exposure:

Full Sun

Sun to Partial Shade



Foliage Color:

Unknown - Tell us


6-8 ft. (1.8-2.4 m)


6-8 ft. (1.8-2.4 m)


USDA Zone 5a: to -28.8 C (-20 F)

USDA Zone 5b: to -26.1 C (-15 F)

USDA Zone 6a: to -23.3 C (-10 F)

USDA Zone 6b: to -20.5 C (-5 F)

USDA Zone 7a: to -17.7 C (0 F)

USDA Zone 7b: to -14.9 C (5 F)

USDA Zone 8a: to -12.2 C (10 F)

USDA Zone 8b: to -9.4 C (15 F)

USDA Zone 9a: to -6.6 C (20 F)

USDA Zone 9b: to -3.8 C (25 F)

USDA Zone 10a: to -1.1 C (30 F)

USDA Zone 10b: to 1.7 C (35 F)

Where to Grow:

Unknown - Tell us


Unknown - Tell us

Bloom Color:



White/Near White

Bloom Characteristics:

This plant is attractive to bees, butterflies and/or birds

Bloom Size:

Unknown - Tell us

Bloom Time:

Late Spring/Early Summer

Mid Summer

Other details:

May be a noxious weed or invasive

Soil pH requirements:

6.1 to 6.5 (mildly acidic)

6.6 to 7.5 (neutral)

7.6 to 7.8 (mildly alkaline)

Patent Information:

Unknown - Tell us

Propagation Methods:

From woody stem cuttings

From softwood cuttings

By grafting

By simple layering

Seed Collecting:

Unknown - Tell us


This plant is said to grow outdoors in the following regions:

Los Angeles, California

Oak View, California

Marshalltown, Iowa

Salem, Oregon

Layton, Utah

Salt Lake City, Utah

show all

Gardeners' Notes:


On Jul 4, 2009, robynhagele from Marshalltown, IA wrote:

We have seven plants on our property and bloom at said time. The bloom is white then turns pink then when in full bloom and sweet they are blue-violet in color. We live in central Iowa on a farm and have some long winters and some short summers but we have had lots of rain so the plants are blooming great this year.


On Mar 24, 2006, desert_witch from Lucerne Valley, CA (Zone 8a) wrote:

A boysenberry is a cross among a blackberry, red raspberry and loganberry. It was created by Rudolph Boysen, and first commercially cultivated by Walter Knott.

They discovered that Rudolf Boysen had abandoned his growing experiments and sold his farm. Knott headed out to Boysen's old farm, where he found several frail vines surviving in a field. The vines were transplanted to Knott's farm where he nurtured them back to fruit-bearing health.

Walter Knott began selling the berries at his farm stand in 1935 and soon noticed that people kept returning to buy the large sweet berries. When asked what they were called, Knott named them, "Boysenberries".

Mrs. Knott began making preserves which made Knott's Berry Farm in California world famous.