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absoluteblock

Fluorescent Lights and Tomato Seedlings

absoluteblock
17 years ago

My tomato seedlings that I started 7-8 weeks ago have a mild case of spotted yellow leaves. During this time, none of the leaves have been exposed to water or high humidity to my knowledge - the entire time has been spent on my kitchen counter under a fluorescent light.

Originally I had planned to start hardening them off this week, but after noticing the leaves, I thought I better check here first.

The Pink Brandywine seedlings have the worst case of this it seems. Other varieties don't necessarily have the yellow spots but the green in the leaves doesn't appear dark enough.

Question: Can "over exposure" to the fluorescent light cause this problem? If not, what else could it be?

Note: About three weeks ago, I did use Miracle Gro when I watered them. Since then, they have grown considerably in size, but I'm not sure if the fertilizer would be a factor or not.

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