Landscaping Portland Plant List Tree & Landscape Manual - Section 1 - Landscaping Regulations and How to Apply Them - 12/20/10 (PDF Document, 812kb) Tree & Landscape Manual - Section 2 - Frequently Asked Questions - 12/20/10 (PDF Document, 477kb) Tree & Landscape Manual - Section 3 - Landscaping Standards L1, L2, L3, L4, L5, P1 and T1 - 12/20/10 (PDF Document, 3,394kb) Tree & Landscape Manual - Section 4 - Maintenance, Irrigation, Protection, etc. - 12/20/10 (PDF Document, 488kb) Tree & Landscape Manual - Section 5 - Plant Materials and Suggested Plant Lists - 12/20/10 (PDF Document, 1,330kb) PDF Information Some of the links on this page are to PDF documents. To open PDF files you will need Adobe Acrobat Reader installed on your computer, it is available for free from Adobe.com.