You can add some rooting hormone if you really feel the need, just be careful which concentration you buy as they some are formulated for woody plants like trees, and some for softer plants that would be more appropriate for CPs.

Really though that's unnecessary 99% of the time for VFT and Sarrs if the rhizome is healthy. Just be patient, keep moist but don't over water and rot them (while their root system can't take up water fast enough) and they should re-root just fine on their own in time. Good luck!