Some leaves turning yelowy-brown

[tanglewood51]

One of my younger plants had several leaves turn yellowy-brown and curl and dry out. Could this be from the greenhouse getting too hot. Or could it be some disease? Advice welcome

 

[Ozbud71]

could it be from water on the leaves magnifying the light and burning them?

 

[oldjarhead100]

just from those pictures I would say you are over watering ,could we get pictures of the plant and soil then we wont have to guess lol