Honestly.... She looks fine to me.

The yellow dying leaf on the bottom is natural with some strains. The plant is focusing all of its energy into new vegetative growth on the terminal areas. Just clip off the bottom leaf, it's no big deal. This will happen a few more times throughout your grow....

The lime coloring is also normal. The newest growth on your plants will often be this color. They will continue to grow out anf darken up a bit.

The potting mix could be a lot better. What exactly are you using? A store bought brand or a home-made blend?