In cold areas, start the tubers indoors about 6 weeks before you anticipate
the last frost. Plant the tuber in potting soil, round side down, about 2-3
cm below the surface. Water well and then keep the soil moist but not
soggy. Keep in a warm, semi-shady area. When all danger of frost has
passed, transplant outdoors being careful not to disturb the roots.Keep in
a warm, semi-shady area. When all danger of frost has passed, transplant
outdoors being careful not to disturb the roots.
In the garden,
need rich, porous, well-drained soil and shelter from wind.
Space 30 cm apart in shade or partial shade. Keep the soil evenly moist and
fertilize at least once a month. Tuberous begonias should be
dug and immediately given a bath after they are lifted. They should be
stored over the winter in shallow, open trays. If there may be mice or
other rodents, place a wire covering over the open trays. Hardy in Zone