Thank you, Stefan. By “let out roots” do you let it sit somewhere in the open until you see roots? How long do you let the roots grow before potting?

A month or less.... and yes, i let it sit in the open.

I root them all in gritty mix, or unpotted. Many will grow roots just sitting there as Stefan said 'in the open'. Some succulents will root easily - stem cuttings or leaves; others will take time and are more 'finicky'. Do you have any particular succulent(s) that you are trying to root?

Thank you Rina, yes, I bought a bulk sale of haworthia cooperi, but only 2 came with a full root system. The rest either have what looks like a starter root or no roots at all. I placed them on top of some inorganic gritty mix, but was not sure if they could root down into it.

I also have a few leaf cuttings that have been sitting on some potting soil for a month that are now starting to form nubs. I wondered if I should try to have them root into gritty mix instead.

Depends on leaves of what succulent? Most of them root quite easily, some will not regardless what you do. Leaves should be healthy for best success rate. They should be twisted off (or pulled off) from the plant. Many will rot even out of any mix. I usually just lay them on small amount of gritty mix and let them be. Sometimes I stick them in the mix (not too deep) but they will likely grow if just touching the mix. Sample of leaves of few different succulents: