Suståne 16-4-8 Root Zone Feeder Packs - John Tillman Farm, Northwest Plantations, Elma, Washington

Evaluate plant establishment and growth results under field conditions in Oregon of two Christmas tree species: Noble Fir (Abies procera) and Douglas Fir (Pseudotsuga menziesii) comparing Suståne 4-6-4 all-organic Root Zone Feeder Pack and Suståne 16-4-8 6-month Root Zone Feeder Pack fertilizer formulations (each at 21 grams per seedling) against an untreated control.


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