OSU Horticulture Resources on Nursery, Greenhouses, and Christmas Trees

Online Resource

Current research, news and information about nursery, greenhouse and Christmas trees

Comparison of noble fir progeny from US Pacific Northwest collection regions and Denmark for Christmas tree traits

Online Resource

Noble fir is the leading Christmas tree produced in the US Pacific Northwest (PNW). This study is based on evaluations of 24,721 trees collected from five native collection regions in Oregon and Washington plus imported seed from Denmark. Traits important for commercial Christmas tree production were evaluated and include commercial height, tree grade, value and color.

By Chal Landgren

For the first 4 months, between fertilization and the first soil sample, actual rainfall was higher than average. For the remaining 9 months, actual rainfall was lower than average.

Nitrogen Fertilizer: Where Does it Go?


Most Christmas tree growers fertilize with nitrogen (N) intending to improve tree color, growth, and ultimately value.

Where does the fertilizer go after application? How much is actually taken up by...

By Chal Landgren, Michael Bondi

Tall Timber Topics


A newsletter for those interested in Forestry, Woodland Management and Christmas Trees in Northwest Oregon.

Developing Quality Christmas Trees in the Pacific Northwest

OSU Extension Catalog

Each Christmas tree species requires special skill and specific knowledge to be grown successfully. This publication outlines how trees grow and the culturing practices necessary to develop the size, shape, and density of true fir, Douglas-fir, pine, and spruce Christmas trees so that they are...

By Chal Landgren

Identifying and Managing Christmas Tree Diseases, Pests, and Other Problems (Identificación y Manejo de Enfermedades, Plagas y Otros Problemas en Árboles de Navidad)

OSU Extension Catalog

This full-color, bilingual (English and Spanish) field guide is for tree growers, field workers, and anyone else interested in Christmas tree production. It features descriptions of diseases, pests, disorders, and damage affecting Christmas trees, and describes how to identify and manage these...

By Chal Landgren, Luisa Santamaria

Growing Corkbark Fir and Subalpine Fir for Nursery Production

OSU Extension Catalog

Explores the cultivation of corkbark fir and subalpine fir for use as landscape (corkbark fir only) or Christmas trees. Topics covered include site selection, seeding production, tree establishment and care, and pest management. Recommendations draw from research trials conducted at the University...

Growing Christmas Trees in the Pacific Northwest

OSU Extension Catalog

A guide for the prospective and novice Christmas tree grower. Includes how to evaluate risk and potential for return. Discusses the tree growing cycle, tasks and time requirements, pertinent laws and regulations, and costs, returns, and taxes. Describes 11 popular species (color photos) including...

By Michael Bondi, Chal Landgren

Weed and Vegetation Management Strategies in Christmas Trees

OSU Extension Catalog

This publication offers an integrated approach to effective weed management in Christmas trees, incorporating diverse strategies and practices to keep weed populations off balance. It includes strategies for using prevention, mechanical means, cover crops and vegetated strips, flame weeding, and...

By Chal Landgren, Tim Miller-Morgan, Ed Peachey

Best Management Practices for Christmas Tree Export (Buenas Prácticas de Manejo para la Exportación de Árboles de Navidad)

OSU Extension Catalog

This full-color, bilingual (English and Spanish) field guide provides Christmas tree producers with information on identifying and managing pests of concern to export trading partners. It features best management practices to help minimize the presence of pests at harvest and describes how to...

By Chal Landgren, Luisa Santamaria, Heather Stoven

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