Anyone unsuccessful in working with an indelible pencil can still use a thin indelible marker to name the tubers once they have dried. The problem is that these markers do not always write well on tubers. Be certain to have several fresh markers and rotate them. Indelible pens work only on completely dry tubers. When a tuber is wet, the ink spreads and whatever one writes becomes unreadable.
Some growers attach labels with wires to mark each tuber.
One grower cuts strips from empty plastic detergent containers, writes the cultivar name with an indelible marker, and attaches the strips to tubers with plastic wire. Storing Tubers over Winter There are numerous methods to store tubers over the winter. The containers, however, must retain the moisture in the storage medium. If the moisture escapes, the tubers tend to shrivel. Most growers seem to use vermiculite in plastic bags to store tubers that have dried for one to two days.