Grayleaf Red Raspberry (Strigosus)

The Grayleaf Red Raspberry (Strigosus) is generally described as a perennial subshrub. This is native to the U.S. (United States) has its most active growth period in the summer . The greatest bloom is usually observed in the summer, with fruit and seed production starting in the summer and continuing until summer. Leaves are not retained year to year. The Grayleaf Red Raspberry (Strigosus) has a short life span relative to most other plant species and a moderate growth rate. At maturity, the typical Grayleaf Red Raspberry (Strigosus) will reach up to 7 feet high, with a maximum height at 20 years of 7 feet.

The Grayleaf Red Raspberry (Strigosus) is easily found in nurseries, garden stores and other plant dealers and distributors. It can be propagated by cuttings, seed. It has a moderate ability to spread through seed production and the seedlings have low vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below -39°F. has high tolerance to drought and restricted water conditions.

Plant Basics
Growth Rate Moderate
General Type Subshrub
Growth Period Summer
Growth Duration Perennial
Lifespan Short
Plant Nativity Native to U.S.
Commercial Availability Routinely Available
Physical Characteristics
Bloom Period Summer
Displays Fall Colors No
Shape/Growth Form Multiple Stem
Drought Tolerance High
Shade Tolerance Tolerant
Height When Mature 7
Vegetative Spread Rapid
Flower Color White
Flower Conspicuousness No
Fruit/Seed Abundance Medium
Fruit/Seed Seasonality Summer Summer
Seed Spread Rate Moderate
Gardening Characteristics
Propagations (Ways to Grow) Cuttings, Seed
Moisture Requirements Low
Cold Stratification Required Yes
Minimum Temperature -39
Soil Depth for Roots 12
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Regrowth Rate None
After-Harvest Resprout Ability Yes
Responds to Coppicing Yes
Growth Requirements
pH Range 4–9 pH
Precipitation Range 16–16 inches/yr
Planting Density 1200–9680 indiv./acre
Soil Textures Coarse, Fine, Medium
Soil Depth for Roots 12
Minimum Frost-Free Days 128 day(s)
Salinity Tolerance None
CaCO3 Tolerance Medium
Sustainability & Use
Leaf Retention No
Palatability Low
Fire Resistant No
Causes Livestock Bloating None

Source: USDA, NRCS, PLANTS Database,
National Plant Data Center, Baton Rouge, LA 70874-4490 USA