Grass seed - in Leilani post lava gasses

[My 2 cents]

Just smooth it out and mow it regularly. The grass will come back on it's own. Most of the weeds that come up won't be able to survive the mowing. This even works on freshly bulldozed areas. I have never planted any grass and I have a couple of acres of it to mow.

The only reason to buy seed is if you want a specific type for a specific project. Good luck keeping it that way. The grass that fills in naturally will be the strongest and needing the least amount of maintenance.

Almost forgot. Step 1. Build a fence to keep the pigs out.