Seven to ten days, in soil. I use Rootech (gel) or Take Root (powder). Use sparingly for any rooting hormone you use, and keep soil out of the jar. (ie: avoid contamination) No nutes for about 3 weeks or so. :thumbsup:
I don't use 'em, but have heard that rockwool plugs or cubes have an inherent ph problem, and have heard it's best to rinse them well with ph'd water before use.