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Gene: I do not know if we are the ones you got it
from, but your new mix is exactly our recipe for Catts and Dens (although we
grow most plants in plastic pots until the plants get too big -- an 8" pot
is my limit on plastic, after that, it has to go to clay or a basket). We
do not have that problem with dead roots; the old ones never look as great as
the newer ones, but we don't find them rotting or causing disease
problems.
This very morning, I repotted Den. Jaq-Hawaii 'Uniwai
Pearl', which I keep because it was an anniversary gift from my husband when I
was new to orchids. The last time it had been previously repotted was
circa 1994, when I put it in a 5" clay pot. By the time it was outgrowing
that, we were busy building this facility, so I just set the 5" pot into an
empty 7" pot (to hold it up), intending to get back to it
"soon" <G>. Well, I just finally got back to it ... the
front growths were, of course, well outside the 7" pot, but the roots
inside the 5" pot although not vibrant white with lots of green tips, were
not soft, rotten or diseased.
One thing we do that might help you -- in a pot or
basket 8" or larger, we usually invert a 4 or 5" pot inside the large
pot, beneath the plant, near the center if possible, or toward the "back"
of the plant if necessary to accommodate all the roots. This prevents that
soggy spot that never quite dries out ...
Good growing,
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