hydroseeding vs. regular seeding?

Answer 1

Hydroseeding will work IF the soil is first properly treated. The slurry mixture looks like JELLO, and contains the moisture, seeds, and fertilizer to get started. The problem is that if you spray this mixture over hard clay or rock, the seeds will germinate and come up, but they will die because they can't get through the hard soil below the slurry mixture.
If hyro-seeding is what you want, have them till the soil 3 to 4 inches PRIOR to seeding.
If you would rather seed the conventional way, wait until September or October. You can use a slicer or a CORE aerator to prep the soil. I use a lot of GYPSUM to help loosen the soil. If you have an existing lawn, you can seed at the rate of 3 lbs per thousand square feet, and it the yard is bare, use 6 lbs per thousand. Just remember that the outcome will only be as good as the prep work.
The Lawn Maker

Answer 2

Hydro seeding is more expensive but if you can afford it it is worth it. Does MUCH better then regular seeding. Stays in place, has fert already there grows faster.

Answer 3

hydromulch is better than either of above