K Barrett wrote:

Turning brown at the base, one part at a time.

Hmmm. Do you mean the bulbs at the bottom or rear of the plant are turning
brown? Those would be the oldest ones, furthest away from the growing
portion of the plant.

Usually crown rot is from the top of a bulb or stem and spreds to the bottom
. And the bulb would get mushy. Like a rotted potato.

Sometimes when a bulb (pseudobulb to use the correct term) loses its roots
the pseudobulbs will wither and die. Mostly the oldest pseudobulbs do that.

So is it the back bulbs turning brown?

K Barrett


It's sort of a tan brown. Starts at the base, gets about half way up
the bulb, and the bulb just falls off. New growth next to it goes next,
in the same manner. The brown area smells just like a rotten Bearded
Iris root. Rancid. Mushy. I know if I don't get control of it soon, I'll
lose the other five bulbs.

west