> question is:
> Do you think the cold weather is what made this red on the outer
> Or do some iris have that in this area and I've just never noticed
It's unlikely the cold weather caused it. Some iris do have red or
purple in the spathes. Some more than the one in your photo. It's
like purple based foliage. TENNESSEE GENTLEMAN even makes purplish red
pods instead of green pods.
Texas Zone 7b, USA