Hi Ken,

Most native grasses do not need highly amended soil, so you probably don't need to amend it.  A soil test could tell you for sure.  A significant limiting factor could be soil compaction, though, and this would need to be mitigated before beginning if applicable.  You can test for compaction by probing the soil with a 10" screwdriver or similar instrument when the soil is moist.  You want to be able to get the screwdriver all the way into the ground without too much effort.  

I'm attaching a two-page instruction sheet about establishing native lawns that covers seeding rates, watering, and care; I hope it is helpful!

Cordially,

John

Yes--they apply to any native grass application (the Douglas County Low Grow Mix, available from the Conservation District, contains both buffalo grass and blue grama, for example).

Cordially,

John

For a new seeding, 20-25lbs an acre is recommended.  The Douglas County Conservation District in Franktown sells it; it is mixed by Arkansas Valley Seed (a local wholesaler) so other retailers who buy from them may be able to bring it in, too.

I hope this helps!

John