Yellow spots ...any suggestions? have pics

[leopard]

10 plants use same soil and same fertilize
only this one got yellow spots on leaves..

 

[leopard]

strain is nirvana northern light ....

 

[Scarfinger68]

Most likely salt build up, Low PH. Flush and give a light feeding. Looks like a potassium lock out which you shouldn't be having in VEG. Hot weather and low PH can cause it.

Read up on potassium
Cannabis Plant and Pest Problem Solver - Pictorial

 

[Scarfinger68]

strain is nirvana northern light ....

I like Nirvana's NL. Grows well and decent producer. My wife's favorite.

**There is a chance it could be some other micro nutrient lock out starting also. My best guess is low PH.