There are species of leaf miner, thrips and mites (not spider mites) that can leave such markings. Crystal's advice is good. Inspect both sides of the leaf through a hand lens or loupe and look for bugs. Thrips can be very very small. A microbial infection is typically more zoned in appearance, but there are people on this forum who know tons more about that than me, so hopefully they'll weigh in. What are you growth conditions/setup? How is overall plant health outside of this problem?
Chromophore Reviewed by Chromophore on . bottom leaves have pale green spots bottom fan leaves have pale green spots, all other leaves look fine. plants are 4 weeks old have been fertilized twice at half strength straight water today. pics later after company leaves!!!! Thanks jeff62 Rating: 5