Sometimes my Saintpaulia have light veins in a darker leaf. I am guessing that this is not normal, though I do see a fair amount of pictures showing plants grown this way.
Most recently this problem started to clear up when I lowered my soil solution pH to the 5.8 to 6.3 range. I'd inadvertently created a batch of soil that had too much lime. I am also guessing that this was caused by a deficiency of N, but that's just a guess.
I'd like to find out what the possible causes are and if it's something that can and should be fixed. For example is it always an N issue but different things cause the deficiency in N, or can it be different nutrients that are in short supply?
I'm posting a picture of a Saintaulia with these characteristics. It's not my plant, but interestingly enough, a person on another forum posed a similar question about her plant earlier tonight.
Here is a link that might be useful: