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Proper Care of Outdoor Bonsai
Trees
Bonsai is the reproduction of natural tree forms in miniature. This art
form has its origin in Japan and China where it has been practiced for
centuries. Bonsai are grown in pots and are totally dependent on you for
their care.
With proper care, your bonsai will remain healthy, beautiful and
miniature for many years to come. Since your bonsai is a living miniature
tree, it will increase in beauty as it matures through the years. The
instructions below are just the basics and, therefore, I recommend that you
purchase one of the many fine books available on the subject.
Placement
A bonsai is a living miniature tree and not a house plant; therefore, your
bonsai must be maintained in a cool/cold environment during the winter
season. As a guide, around Thanksgiving Day it is time to prepare your
bonsai for its winter dormancy period which should last approximately three
(3) months. This can be accomplished in several ways. One method is to bury
your tree in the ground (preferably without the pot) up to the rim of the
container and then mulch up to the first branch. It is best to choose a
location that is protected from wind and sun, but not rain or snow. A second
method which is also common is to place your bonsai tree(s) in an unheated garage
or shed. During this time, your tree does not require light because it is in
a dormant state; however, it will require watering approximately every two
weeks. Throughout the spring, summer and fall your bonsai should be placed
outside, such as on a patio, balcony, terrace, or in a garden. Once outside,
your bonsai should be positioned where it will receive sufficient sun –
morning sun and afternoon shade is best. A bonsai can be viewed best when it
is placed approximately three to four feet high (eye level), such as on a
table, wall or bench. A bonsai can and should be brought into the house on
special occasions and displayed in a prominent place. Your bonsai should not
remain inside for more than a few days at a time, as the atmosphere is
detrimental to the health of your tree.
Watering
The watering of your bonsai must never be neglected. Apply water when the
soil appears dry -- never allow the soil to become completely dry. If your
bonsai is receiving full sun, it may be necessary to water once a day. This
schedule may vary with the size pot, type of soil and type of bonsai tree
you own. Evaluate each tree's water requirements and adjust your watering
schedule to accommodate it. It is a good idea to use a moisture meter until
you get to know the requirements of your bonsai tree. Watering should be
done with a watering can or hose attachment which should dispense the water
in a soft enough manner as not to disturb the soil. Water should be applied
until it begins running out of the holes in the bottom of your pot. A good
rain is usually a sufficient watering.
Fertilizing
Fertilizing is also necessary if your bonsai is to remain healthy and
beautiful. Since your bonsai is growing in such a small amount of soil it is
necessary to replenish the soil's supply of nutrients periodically. Any
general-purpose liquid fertilizer will do fine and is available at most
garden centers. We suggest that fertilizers be used at half their
recommended strength. Fertilizer should be applied at least once a month
except during the winter. Your bonsai will also respond well to foliar
feeding, with a water-soluble fertilizer applied every other month as a
spray.
Training
This brief explanation of basic care does not cover training. Training deals
with the art of bonsai and should be thoroughly understood before
undertaking -- or left to a professional. However, most of the true bonsai
trees you find have already been through their training period, thus
requiring only periodic trimming and pinching to remain miniature.
Trimming and Pinching
Trimming and pinching keep your tree miniature. Pinch and trim back the new
growth to the farthest safe point. Never should all of the new growth be
removed. A little should be left to sustain the health of the tree. Tropical
and sub-tropical trees used for bonsai will require periodic pinching and
trimming throughout the year. Since different trees grow at different rates,
it is necessary to evaluate each tree’s rate of growth and adjust your
trimming and pinching to accommodate it.
Repotting
Repotting must be performed periodically on all bonsai when their root
system has filled the pot. The reasons for repotting are to supply your tree
with fresh soil, and to encourage a more compact root system. As a rule,
most deciduous trees require repotting every two or three years, while
evergreens only need to be repotted every four or five years. Since trees
grow at different rates, this schedule will not always hold true, therefore,
you should examine your tree's root system each year to determine if it has
become pot-bound. In most cases, the potting process is easy and safe if
performed properly and at the right time of the year. Repotting should be
done in mid-summer. The tree, along with all of its soil, should be removed
from the pot. The outer and bottom most fourth of the tree's root mass
should be removed. This is done by raking the soil away then pruning back
the roots. In most cases it is not good to prune back more than one fourth
of the tree's root mass. After this, the tree can be placed back in its
original pot or into another. The pot should have screen placed over the
drainage holes. Then, a thin layer of small gravel is placed in the bottom
of the pot for drainage purposes. On top of this gravel is placed the new
fresh soil. Place a layer of well-draining soil which is sufficient enough
to elevate the tree to its previous height in the pot. After placing the
tree back in the pot, the area left vacant by the pruned root mass should be
filled in with fresh soil. This fresh soil should be worked in around and
under the root mass in such a manner as to avoid leaving any air pockets.
After repotting, your bonsai should be thoroughly water. This can be
achieved by submerging the entire pot in a tub of water. Moss or other
ground covers can be used to cover the surface of the pot to help prevent
soil erosion when watering.
Insects and Disease
Since your bonsai is a normal tree, only miniature, it can be treated for
insects and diseases the same as any other tree. If you discover any insects
or diseases, our website contains several products which will help you
eliminate the problem.
Content used by permission from Bonsai
Boy.
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