Hi Kirstie,

When I see the Rosemary I think it get not enough water for the new situation. What kind of grow light are you using ? how much power and how far above the plants. Aloe is a high light plant I don't think you can give it too much light but you never know.

"custom soil mixes of soil, spaghnum moss, perlite, and sand"

By "spaghnum moss," did you mean sphagnum peat moss? I ask because there is a difference and sphagnum moss is rarely used because it is much more expensive than sphagnum peat moss.

You are not supposed to use soil in potting mixes unless it is pasteurized. Is it? If not, all of your plants are likely diseased.

I think it's moreso a watering issue and less of a light issue.

First, there's no need for pebbles at the bottom. It actually works against drainage instead of helping.

Lastly, the mix of peat (I'm pretty sure that's what you meant) and sand would not make for a fast draining mix. Your plants are likely staying wet for too long and that's causing problems.