Joseph Blumenthal wrote his recollection of Frost's first Christmas card in the The Spiral Press Four Decades.
While the book [Collected Poems, 1930] was in work, it occured to me that his poem "Christmas Trees" would make a most appropriate holiday greeting booklet for my wife and myself. Frost's publishers gave permission. Through foolish and unpardonable diffidence, I failed to ask Mr. Frost, whom I had not yet met, if he wished copies for himself. Later he chided me for this and charged me with the responsibility of getting back a half dozen booklets for himself and his family....It was the beginning of the tradition of the Frost Christmas cards which was to continue until 1962.