How old are the first seedlings?

I have a handful of seeds ready to be planted, along with 6 baby adeniums that are 4 weeks old

If you want to buy premade, look for cactus/palm/citrus mixes at stores. Just make sure it drains very well.

Thanks AJ....just made some using coco coil and perlite. Fingers crossed!

I would add some compost to that mix unless you plan to transplant quickly and/or will be diligent with liquid fertilizer. Wash that coir good as some have very high salt content still in it.