Property Owners or Renters of Properties One Acre or smaller in size are required to cut and maintain weeds and grass to no more than 4 inches in height on your entire property and on abutting park rows, alleys and other right-of-way areas abutting your property.
The owner of any lot or parcel of land within the limits of the City of Ashland shall cut and/or remove weeds growing thereon, and on adjacent and abutting rights-of-way AMC 9.04.020
Decorative residential landscaping is exempted from these requirements unless that vegetation is a fire, health or traffic hazard. AMC 9.04.15
Noxious Vegetation (includes Himalayan Blackberry)
The owner of any lot or parcel of land within the limits of the City of Ashland shall not permit noxious vegetation to grow upon their property and on adjacent and abutting rights-of-way. AMC 9.04.024
Clearance Distances from Structures
Weeds and noxious vegetation on a property of any size are required to be removed within a minimum of 30 feet from any structures, including structures on adjacent properties. Minimum clearance distances shall be increased by 10 feet for each ten percent increase in the average slope of the property over ten percent.
Please check out this useful resource:
MANAGING HIMALAYAN BLACKBERRY IN WESTERN OREGON RIPARIAN AREAS
By Max Bennett-Forester, Associate Professor and Oregon State University Extension Agent
for Jackson and Josephine counties