I'm trying my hand (for the first time) at gardening. I'm growing vegetables entirely indoors. I have an aerogarden that I use with seeds and once they are large enough, I transplant them. Right now I am growing 1 buttercrunch lettuce, a green bean plant, tomato, and cucumber plant. They've been growing like crazy and have been super healthy. I was about to put some miracle gro plant food on them this morning when I noticed spots on my lettuce. The brown spots are on one leaf but another leaf seems to be having the sunken areas as if it is experiencing the same thing, just not as advanced. Here are some pictures. Any ideas?

I just found someone else'
s post on another forum and the response was it appears to be a leaf spot fungus and to clip the leaves affected, fertilize, and only water in the morning. I was sprinkling some of the water on the leaves gently and it probably caused this. Still a baby gardener over here so I'm learning! If anyone has advise, PLEASE share.

Strangely I've gotten attached to my little plants and I hate it when I do something that hurts them

My friend tells me her Aerogarden works quite well. for lettuce

Just to note- sprinkling water on a plants leaves has no particular benefit.
I think tomato is much too big to stay in an Aerogarden unless it is a tiny one like
https://www.renaissancefarms.o...