Cymbidium bulb rot and yellowing leaves in Semi-Hydro.

[empiref]

Hello,

One of my cyms started to show some signs of trouble about 3 weeks ago.

When I first got it, it had 3 bulbs that were loosely attached to the other 5 big bulbs, the cym was in flower, i had 2 flower spikes and bright green flowers.

The trouble started with signs of yellowing leaves on the loosely attached bulbs, 2 mature ones, the leaves started falling off one by one, in an interval of couple of days between each, until the bulbs had no leaves left. (the entire leaf would get yellow, then dry brown then fall off). After the leaves would fall off, the bulb would turn to brownish yellow dry color at the bottom, then i'd twist it, remove it, throw it away, and then sprinkle some cinnamon powder on where the bulb was attached.

It also had a new growth which started shortly after I moved the cym into semi-hydro. Today, I was checking on it because it had a yellowing leaf on the outside, and suddenly the bulb snapped off and leaves were broken off. I unpoted it, removed the base of the bulb and sprinkled some cinnamon powder for about 30 minutes before I repoted the other bulbs again.

The foliage of the other bulbs are green and the bulbs are solid-firm to the touch and not soft, although a new growth is a big soft at the base, but I guess it's because the new growth hasn't matured yet.

All my cyms are placed outside, and has been in the same place for the last 5 months. they receive about 7 hours of direct sunlight a day, 3 in the early morning and 4 in the late afternoon until the sun sets.

I water once a week, by flushing the entire pot, the reservoirs are never empty and use a well balanced fertilizer weekly weakly, in addition of Kelpak every 15 days.

I have attached pics below, your opinions are well appreciated because I don't want to lose my cym.

Thank you in advance.