I have 5 plants that moved outside. One has been outside for a couple of weeks and the other ones moved outside 6 days ago. Yesterday I noticed what I first thought were black spots on the bottom of the leaves. However, when you hold the leaves up to light you'll see that it's not black spots but thin/transparent spots in the leaves. Below are pictures of the same leaf, just one of the pics is me holding the leaf up so light will shine through. Any ideas of what is causing this would be great!