Browse resources Displaying 1 - 2 of 2 resources Photo: Judy Kowalski (Cropped from original) Drought hinders popular noble Christmas trees Growers and Oregon State University continuously look at novel ways to improve first year planting success. Dec 13, 2022 | News story Photo: Chal Landgren (Cropped from original) Noble fir seedling survival strategies Christmas trees planted in unirrigated sites depend on the weather for survival. A research trial set out to find factors that would help seedlings survive during drought years. Results were mixed. Judy Kowalski, Chal Landgren | Jan 2020 | Article