Roots should be pulled and selected at maturity
(see Selection). Once selected the roots may be
planted immediately or stored in cool, high
humidity conditions. Vernalization requirements,
necessary for flower initiation (bolting), are
almost always met during the month of growth in
mid-spring when they accumulate time of
exposure to cool temperatures almost every night
and sometimes during the day. In commercial
seed production, the roots of these small-type
radishes are often stored in a cooler at 35–42°F
(2-5°C) for approximately 7 to 10 days. This
insures that all of the radish roots in the
population receive adequate vernalization so they
will bolt swiftly and uniformly upon replanting.
This also contributes to the likelihood that all of
the plants within the population will crosspollinate
more evenly, as they will flower closer
to the same time, and the seed will more
uniformly