Brown spots on lettuce seedlings
I am a novice gardener trying my hand at vegetables this year. Any help or suggestions anyone can offer would be greatly apprieciated.
I have a flat of Bibb Lettuce seedlings that are about 10 days old growing under lights. I noticed that I have small brown spots showing up on about 50% of the leaves. As far as I can tell the plants look pretty good and are growing rapidly.
I have been careful not to over water these so I don't believe that this is the problem. I used Jiffy seed starting mix so I have to believe that it's not something caused by the soil.
I do remember reading somewhere not to handle tomato plants without washing your hands if you are a smoker. I do smoke so is it possible that transfered something to these plants by touching the leaves?