I do not use rockwool. What I do is fill my net pots up with hydroton then I make a hole in the middle by taking out some pebbles until its about an inch deep. Then I put a mixture of vermiculite/perlite in that hole level with the top of the hydroton. I then poke a hole down about 1/4 inch and drop my bean in and cover lightly with vermic/perlite. The bean will sprout within 4 to 5 days. works everytime.

I think its important to have a drip until the roots start to get into the water below then its not as important.

Good job on the grow bro!

Peace