The best is grown by planting 8-inch lengths of root grown the previous
year. These young roots planted in spring, small end down, with the
top two inches below the surface, in rich, well-cultivated soil, will
form radish of large size and superior quality, in one season’s growth.
After having several weeks’ growth rub off the young side roots from
the newly-planted roots, to increase the size and insure a smooth,
well-shaped root. See to it that no roots are scattered about the
garden, as every piece of root, however small it may be, will, in a
short time, become a strong plant, difficult to eradicate, and thus
prove how annoying a good thing is in the wrong place.