How long before the first roots appear? Hardwood, softwood? Leaves or no? With scarifying or without?
I've attempted to root in rockwool and also perlite/vermiculite mix, with softwood/semihardwood/hardwood cuttings, with and without leaves, with and without scarification, with and without heat, and none of the cuttings ever even form callouses.
I think in the future I need to sterilize the cuttings better, bury the cuttings deeper in the rooting medium, pretreat with copper, and keep them less moist. I seem to have a problem with muntingia in particular rotting/molding, even though I'm having no trouble rooting mulberries/peanut butter fruit/Chilean guava right next to it.