Douglas-fir container stock grown with fertilizer-amended media: Some preliminary results

Incorporating fertilizer directly into the container growing media is a very new practice. Previously, it was believed that such a practice would result in toxicity due to direct contact with the root system and/or over fertilization. However, with the improved technology for controlled-release fertilizer, there is renewed interest in this practice. The objective of this study is to quantify the seedling response to various fertilizer treatments as compared to unfertilized seedlings and plug+1 seedlings.