This section is from "The Horticulturist, And Journal Of Rural Art And Rural Taste", by P. Barry, A. J. Downing, J. Jay Smith, Peter B. Mead, F. W. Woodward, Henry T. Williams. Also available from Amazon: Horticulturist and Journal of Rural Art and Rural Taste.
"Does the Sweet Bough ever have a faint blush? Some specimens exhibited at our State Fair called the Bough, had a blush, but I can find no descriptions that mention it." J. A. D. The Sweet Bough, in common with nearly all green or yellow apples, has a faint blush when grown fully exposed to the sun - and this is so common or almost universal with apples of this class, that pomologists have regarded it as hardly necessary to mention as a distinctive point.
Different seasons, soils, and stocks, produce various results in coloring apples. We have known the Rhode Island Greening, in some years, to be a full deep green, on every part of the tree; and in other years, to have very generally a deep reddish brown cheek. The Porter is usually remarkably free from a brown tinge ; yet during the growth of the fruit towards the close of summer, it has been seen to have conspicuous stripes of red in the sun, but which entirely disappeared when fully matured. A long warm season does not always produce the highest color - it was observed a few years since at one of the Ohio fruit conventions, that the specimens from the warm region of Cincinnati were not nearly so much reddened aa those from the cooler shores of Lake Erie at Cleveland. An interesting incident under this head once occurred in the case of the first specimens of Jewet's Red which we fruited - they maintained so green an appearance until nearly grown that we were led to doubt their genuineness, but being blown off by wind, they were carried into a room, where in a fortnight, a profusion of red stripes gradually covered the whole surface.