I have a threesome of tomato plants planted in on my porch. All three have some leaves that seem to be a bit white and powdery. One of the leaves has even started to turn a bit brown.
I don't think this is blight, I'm pretty sure I know what that looks like and it doesn't seem to be a watering deficiency/too much water as they are in self watering containers and I really only ever water from the bottom.
My biggest of the 3 plants seems fairly unaffected although a couple of its lower leaves seem to have some of this discoloration.
However the other two (on either side of the first) seem to have the discoloration on the leaves. Its mostly the lower leaves. Is this something to be worried about or is it normal? (pics to come if needed)