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.
We have seen people surprised that some tender plants made slow progress after potting where soil not much above freezing had been used, and, perhaps, also watered with cold water; it would be more surprising if many did not die. In last month's notes we mentioned the importance of keeping the pots containing plants in greenhouses clean by washing the outsides when necessary; it is quite as essential for the inside of pots to be clean when the plant is placed in it; if a dirty pot is used the roots cling to the sides to such an extent that it is difficult to turn the plant out again without breaking many of the best roots, or shaking the ball to pieces. We are aware washing pots is generally looked upon as a great waste of time and money in this country, and for growing very cheap plants by the thousand in the trade there would not be sufficient advantage gained, independent of appearances, to compensate for the labor expended; but we consider a fifty cent plant will pay for a clean pot.