Exactly what I was thinking! Or even what madhatter said.Could it possibly be a little bit of sunburn?
one of my scotch bonnet in hydro is doing the exact same thing. started abot a week ago. yesterday i took it out of hydro and washed its roots in warm water. think i will wash the roots again today but add some baking soda to the water. this time i may trim the roots as well.
i am thinking perhaps its not absorbing enough of one of the macronutrients or getting too much of another. it does get a splash of epsom salt mist frequently.
i have several other plants in the hydro centre but none of them are showing any signs.
can you look at the roots and see if they are white or turning brownish?
What does the underside of the leaf look like? Just shooting from the hip, it looks like some kind of pathogen (bacterium, fungus, virus, etc.). It could be some sort of nutrient issue like BC was getting at but I'm looking at the circles with the black rings. Could be fungal fruiting bodies.
Just as a suggestion, I would mix some baking soda in with your water and spray down the leaves.
Could it possibly be a little bit of sunburn?
Looks like they got somewhat weathered...Mine look like that when they've been whipped around by wind and rain.
Hmmm happening in the past week eh! looks like a classic case of radiation poisoning/burning. How close are you to Fukishima.
Water droplets on the leaves while under the sun can cause small burns like that.That's what I initially thought of the large tan areas. But the smaller brown areas are what gave me pause.
Yes, but it does nothing for your post count....Hmm, just noticed the multiquote button.
Definitely a possibility too.Fertilizer burns? Too much nitrogen ?
Water droplets on the leaves while under the sun can cause small burns like that.