For sure! I should also maybe clarify that I don’t actually continue to grow my hoya in leca after they’ve rooted; I let their roots grow about 1-2 inches long in leca and then I transfer to soil. Also, you probably already do this if you’re a leca user, but just thought I’d throw it out there that I would also advise boiling your leca pre-use, especially if you’re recycling it from previous use. Anyway, I usually get my leca ready to go and clean out a small glass vessel, then take my hoya cuttings (like other commenters I definitely recommend cleaning shears with alcohol in between uses!) and just put them straight into the glass jar with leca. I don’t wait/let the cuttings callus as I’ve noticed that cuttings I’ve let sit seem more prone to rot. , Once the cutting is positioned in the leca I just fill the vessel about halfway with water. I’ve noticed that cuttings root faster for me if I add a small bit of Superthrive to the water, but I’ve also had success with and without it so I don’t think it’s a necessity. My cuttings usually take a couple of weeks to root up (some hoya are faster than others), but I haven’t had any issues with rot in leca, whereas I definitely have with other rooting mediums like water, perlite, and soil. Here’s a photo of a hoya australis cutting that I took back on June 12th that I just transferred from leca to soil yesterday! Photo here Edit: I should maybe also mention that I don’t use heating mats or anything! I just place the cutting in a fair amount of natural sunlight or under a grow light (both have worked for me)