While most historians and critics have focused on the treatise, Judith Major gives equal emphasis to Downing's spirited monthly editorials in the Horticulturist. In the journal, Downing "spoke American" and encouraged his countrymen and women to practice economy, to use America's rich natural resources wisely yet artfully, to be content with a little cottage and a few fine native trees.

Each number is the catalogue of a specific school or college of the University.