Hi C-H's,
Paul Karpowicz wrote:
>Usually when leaves at bottom of plant yellow & then fall off,
>it's a sign of Nitrogen deficiency.
I have also noticed that my rocotos regularly drop most of their 
leaves when I overwinter them. Somewhere, I forget where, it was 
suggested that Capsicums may be at least partly deciduous. This fits 
with my observations.
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                      Regards,               Cameron.