"As soon as roots are visable outside of the rooting medium, (rockwool, peat pellets), you can plant them."
The ones you have in just water, you can plant in soil when the roots are visable. Don't pack the soil.
If you look on the green bar above, you'll see the word "Search". If you use words like "rooting" or "seedling" or "clone", you'll discover that many many posts exist for you to read about what you're asking. Try it out before asking a question and you'll find a lot of the information yourself.
We have 63,000 posts on this board now that hold a lot of information. If you do some searching, you'll find most of your questions have already been asked many times. That would help all of us a lot.