Page 109 - Tài liệu Ebook cây cảnh Bonsai Basics

BONSAI CALENDAR Ill

EARLY WINTER

With winter upon us, all bonsai trees rises, so that plants can benefit from the
vulnerable to severe frost should have sunlight and good ventilation too.
been taken indoors or given some form You can continue wiring conifers to
of protection from the cold. If you have shape them throughout the winter.
nowhere to put any delicate plants, make Watering should almost cease, to limit
a temporary wooden or metal frame the risk of the soil, and therefore the
covered with a lid of transparent plastic roots, freezing during any unexpectedly
(such as a polythene sheet). This has the early cold snaps. Fertilizer serves no
advantage that it can easily be removed useful purpose in winter, since the plant
or opened as soon as the temperature is dormant and so needs no nutrients.

INDOOR BONSAI

The seasonal cycle of growth of indoor Pruning for shape should be carried
bonsai is very different from that of out in early spring, with leaves (of the
outdoor bonsai, since there are no sea- ficus species, for exam pie) being cut back
sonal variations in climate. But this is as spring ends. Wiring can be under-
not to say that the plant its~lf has no taken all year round, but be sure not to
seasonal cycle. It is governed by its own leave wires in position for more than
biological rhythms, rather than by envi- three to six months without removing
ronmental factors. and adjusting them.
Although watering should continue Repotting should take place in spring
for most of the year (tropical plants not every second year. The roots should be
being used to any dry season), fertilizer pruned at the same time and the propor-
should not be given in winter. tions of the root ball corrected.