Plants with same light requirements don't show up under "My Plants". I have a corn plant that requires shade to partial sun...doesn't show up under my readings near my back door. My ZZ Plant shows up...shade to partial sun. But my Boston Fern does not...though it requires shade to partial sun as well. And my Philodendron is listed, too...shade to partial sun. I can go on and on. So...what's up? If they all require shade to partial sun, shouldn't they all be listed under my reading for my back door?

Apparently my house is a black cave. Every place I put it, it says there is insufficient light to grow plants. Am I doing something wrong. Should the unit be facing a certain direction?