Help identifying issues with soil/perlite grow.

[Floodster31]

I have just noticed these markings on 2 of my 5 plants. They are grown in a greenhouse in soil/perlite mix. They have been fed canna flora at 1/2 strength for the past week mixed to ph 6.5 with water many thanks in advanced with you input

 

[Dirtbag]

Looks like they had water droplets on them under full sun. Are you misting the leaves? Could just be from dew condensation, although that would be odd in a greenhouse, unless your day/night temps are swinging excessively.

 

[Floodster31]

Looks like they had water droplets on them under full sun. Are you misting the leaves? Could just be from dew condensation, although that would be odd in a greenhouse, unless your day/night temps are swinging excessively.

Dont think it could be water and temp does swing but only by 5 degrees at most they have fans in with them

 

[Floodster31]

Looks like they had water droplets on them under full sun. Are you misting the leaves? Could just be from dew condensation, although that would be odd in a greenhouse, unless your day/night temps are swinging excessively.

Should I cut the leaves that are effected off and see if it comes back on newer growth?

 

[Dutch Jon]

looks kind of when you sprinkle nutes accidentally on your leaves