Browning Leaves

[Hmm Boags]

I have started to notice a strane brownish stain on the underside of the leaves on my plants. It looks like t should rub off but I can't seem to bidge it. Any ideas?

 

[TXCG]

It look anything at all like this?

(click for bigger picture)

I had that problem on several plants that ended up having all kinds of problems and getting tossed off the balcony.

 

[Hmm Boags]

yeah looks just like that. Do you know what it is?

 

[chilliman64]

have you noticed any mite/thrip activity? what about leaf curl? get your magnifying glass out and carefully inspect the underside of the leaf for tiny bugs.

 

[Hmm Boags]

There has been a few aphids about but I took care of them after I noticed a bit of leaf curl. They have been gone now for about a week, and then this..... bastard aphid shite bag bugs why can't they piss off and eat something else.