A Master Gardeners’ recommendations are made only after consulting research based information. Oregon State University’s premier Horticulture program is the first check when addressing a gardening question. Below are links to many of the authorities used when addressing home horticulture questions.

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General Gardening Questions

• OSU Extension Website – General Gardening Articles
  • Growing Your Own
  • Soil Testing Labs
  • Managing Diseases & Insects in Home Orchards
  • Encouraging Beneficial Insects
• OSU Extension Publications Catalogs

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Plant & Weed Identification

• OSU Broadleaf Plant Search
• Common Trees of the Pacific Northwest
• Weed Identification (University of California)
• Weed ID Gallery (University of California

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Insect & Spider ID

• PNW Pest Managment Handbooks
• Washington State University HortSense
• UC IPM (home garden, turf and landscape pests)

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Pesticide Resources

• National Pesticide Information Center (NPIC)