Cotoneaster, Rockspray (Cotoneaster horizontalis)-Hort Answers - University of Illinois Extension
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University of Illinois Extension

Hort Answers


Cotoneaster, Rockspray
Cotoneaster horizontalis

Rockspray Cotoneaster
Rockspray Cotoneaster
Small pink flowers in late spring and bright red fruit in late summer. Reddish purple fall color. In winter, the stems show a distinct fishbone pattern. 
Full sun to partial shade. Prefers a moist, well drained soil, but will tolerate some dryness. Tolerates alkaline soil. 
  • 'Robustus'-fruits heavily and is a little taller (3 feet).
Mature Height
2-3 Feet
USDA Hardiness Zone
5 - 7 
Bloom Color
Bloom Season
May - June
Soil Conditions
Moist, Well-Drained
Exposure/Light Requirements
Full Sun
Partial Sun/Shade
Foliage Color
Pests and Problems

Bacterial Disease

Environmental Damage

Insect Relative Damage

Additional pests and problems that may affect this plant:

Fireblight and spider mites are common problems.
Additional Notes
Growth rate is slow.


Related Resources
Home, Yard & Garden Pest Guide
Illinois Commercial Landscape and Turfgrass Pest Management Handbook
U of IL - Distance Diagnosis through Digital Imaging
U of IL - Plant Clinic