When I, in
brief, look back recently growth condition of Azalea, I think there are some
minor problems about its plant maintenance.
First of all, I would like to point out that concerning the method of
pruning. On the other hand, I want to say the
problem of poor growth rate that cause from physiological response or
I think that rapid wound-healing in plants is as important in the
fight against infection as it is in animals. Generally speaking, an
opening made in phloem tissues is sealed by the exposed cells on the
wound surface which collapse and die. Scars on tree
trunks, and branches with well-established secondary growth, are first
covered with callus, parenchyma tissue arising from the division of cells
near the wound surface.
However Azalea has poor recovery system for wound healing and
different morphological feature on callus, parenchyma tissues that emphasize
the growing strength of plant and prevent water loss.
Some plants, as you know, have inadequate morphological feature, so they
often can't avoid severe damage like rot, insects, fungus and water loss.
Section of pruning and unacceptable judgment on pruning period are very
important elements to avoid damages.
Potentially shrubby trees have hardy characters indicated right picture.
This picture shows Azalea's powerful life-line like shoe string. The
trunk get damaged more than 80% of it's whole surface. I could easily
expect that it was survived until last storm.
To prevent the case I suggest gradual trimming and pruning in
accordance with each biological character through the year. So
we should keep in mind to carry on proceeding pruning for developing new
growth as fast as possible. We also should make sure however outlook
of plants, growth condition and surrounded circumstance are.
Actually Azalea is one of very hardy plants, but we should avoid hard
pruning, in particular old big trunk, as much as possible. I wonder if
we should set more concrete described guideline or something like that on
pruning, especially hard pruning and how to keep naturalistic habitat, to
make the garden more impressive.
If we put on this standard pruning guideline, we can definitely get
balanced shaped outlook of Azalea and keep more peaceful naturalistic scene
in it as result. According to these treatments, we can always come to
see best condition of showy appearance in those areas. I consider that
trimming consisting upright open shape and mulch trunk structure will
provide unique protection against external damages whenever we have stormy
weather. Needless to say, sustainable pruning also provide neat
outline of plants.
Merit of mulch trunk style
1. Easy to judge renewal pruning needed.
2. Reduce destructive damage caused by nature phenomenon.
3. Get lots of flower and last long blooming.
4. Enlarge capacity of the photosynthetic process.
5. Keep sustainable attractive outline of plants.
These show three cases how develop new
growth after hard pruning below.
* Above left chart means pruning section with no branch to follow
up. New growth come up from basement close to roots.
A lot of parts died back because of dryness and physiological stress.
Start getting disease,fungas and rottening aggressively.
Struggling for existence.
* Middle chart means pruning section with singular branch to
support. Part with no branch wilt and die.
Supportive branch occurs new growth.
* Above right means recommended pruning with minimum damage and new
growth. Speedy recovery at opening made from trimming.
Healthy reddish surface of bark.
Whatever I would
like to say about rough treatment on wound healing after pruning and
expanding died back xylem tissue caused by them. In spite of their
severe damage caused by careless pruning, the fact that people, who have no
doubt the report horticultural pastes have no good effect for woody plants,
doesn't take care of wound healing after their pruning in The Western. I
couldn't imagine that at all. Lots of Azalea have gotten not only
physiological damage but physical one because of dryness, rotten and died
back of wound parts.
I suppose that its hard to say
one word whether recommended pruning methods are available for the plant, in
particular Azalea, or not in those cases. But I believe that this method is
very helpful for plants at least to develop parenchyma tissue around wound
area. After all, we should pay attention with our considerations to each
wound care problem according to physiological characters. So we sometimes
need some kinds of wound care treatment like horticultural glue or paste in