Check the pH- MG soils can bottom a little sometimes. Don't think that's your problem- seems very localized.

Tough to see, but there seem to be dark specks on the underside of the leaf, suggesting a pest problem- my first guess would be mites. Have a look at the underside of an affected leaf w/ a scope- you're looking for bugs, little pearl-looking things which are eggs, or feces
rhizome Reviewed by rhizome on . Plant Problems For First Time Grower Can anyone help me diagnose my plant problems? One of my plants has some yellow spots on its lower leaves. I transplanted the seedlings about one month ago using Miracle-Gro Moisture Control soil. The plants have been under 24x7 light since seedlings. I have only used Miracle Gro's All Purpose Plant (24-8-16) Food once about 3 weeks ago. I would gladly appreciate any replies. Thanks my fellow growers. I have: 2-plants 1-Fluoro light fixture 2-45watt cool white bulbs 24x7 lighting Rating: 5