Rockspirea (Dumosus)

The Rockspirea (Dumosus) is generally described as a perennial shrub. This is native to the U.S. (United States) has its most active growth period in the summer and fall . The Rockspirea (Dumosus) has dark green foliage and inconspicuous white flowers, with a moderate amount of conspicuous brown fruits or seeds. The greatest bloom is usually observed in the late summer, with fruit and seed production starting in the summer and continuing until fall. Leaves are not retained year to year. The Rockspirea (Dumosus) has a moderate life span relative to most other plant species and a moderate growth rate. At maturity, the typical Rockspirea (Dumosus) will reach up to 3 feet high, with a maximum height at 20 years of 2 feet.

The Rockspirea (Dumosus) is usually not commercially available except under contract. It can be propagated by bare root, container, cuttings, seed. It has a moderate ability to spread through seed production and the seedlings have medium vigor. Note that cold stratification is not required for seed germination and the plant cannot survive exposure to temperatures below -23°F. has high tolerance to drought and restricted water conditions.

Plant Basics
Category
Growth Rate Moderate
General Type Shrub
Growth Period Summer, Fall
Growth Duration Perennial
Lifespan Moderate
Plant Nativity Native to U.S.
Commercial Availability Contracting Only
Physical Characteristics
Bloom Period Late Summer
Displays Fall Colors No
Shape/Growth Form Thicket Forming
Drought Tolerance High
Shade Tolerance Intolerant
Height When Mature 3
Vegetative Spread Rapid
Flower Color White
Flower Conspicuousness Yes
Fruit/Seed Abundance Medium
Fruit/Seed Seasonality Summer Fall
Seed Spread Rate Moderate
Gardening Characteristics
Propagations (Ways to Grow) Bare Root, Container, Cuttings, Seed
Moisture Requirements Low
Cold Stratification Required Yes
Minimum Temperature -23
Soil Depth for Roots 12
Toxic to Nearby Plants No
Toxic to Livestock No
After-Harvest Resprout Ability Yes
Responds to Coppicing Yes
Growth Requirements
pH Range 7–8 pH
Precipitation Range 10–10 inches/yr
Planting Density 300–600 indiv./acre
Soil Textures Coarse, Medium
Soil Depth for Roots 12
Minimum Frost-Free Days 120 day(s)
Salinity Tolerance None
CaCO3 Tolerance High
Sustainability & Use
Leaf Retention No
Palatability Medium
Fire Resistant No
Causes Livestock Bloating None

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