Propagation: Leaves are yellowing & veiny. Why?, 1 by Prism

Prism wrote:
I have several new plants that have yellowish & veiny leaves. I think that it might be too much fertilizer but I wanted to see if anyone had any other ideas.

I started fertilizing with a quarter strength petunia fertilizer recommended by the nursery where I purchased it. But I had forgotten that I also put a dry 5-3-3 fertilizer in the soil when I potted them up to the 8 ounce stryo cups. This worked really good last year, but I didn't start liquid fertilizer on them till much later.

Thanks for any help or suggestions.
Pam

Here's a picture: