No nutes for 7-10 days, they just don't need it till the roots are developed. In fact, using none till they are at least a week old pushes them to seek water and nutrients, building root mass. A drop or 2 of Clonex, Dip and Grow, etc in the first watering can help however. You must dilute it according to directions first, then add drops to the water you'll use in the first watering. Just the once though, is all that's needed
Here's another tip for you, if you plant to transplant later, do so when the leaves are the width of the pot. That is the point when the roots have built a root system to the bottom of the pot, but root circling is only beginning. You'll find your transplants show no signs of transplant shock and begin to grow within hours, I've done it many times!
I don't use rockwoool anymore for two reasons, one being these exact issues, and secondly, it is a source of landfill pollution, it doesn't breakdown for a LONG LONG time!
Jiffy pellets or Root Riots are a much better starting medium and can be transplanted into any type of system.