Nature's Plant Food Bag, Byron, ca. 1900
This bag was used to package plant fertilizer manufactured from phosphate mined at the Mendearth Mine in Byron between 1890 and 1936. Phosphate which was an abundant mineral found along the Swift River.
A review of Nature's Plant Food's fertilizer in the 1918 Bulletin published by the Massachusetts Agricultural Experiment Stations suggests that their fertilizer does not have any effect on plant growth.