wrote:
Ok - I just tested my soil. My pH is around 6.5-7.5, my N is non
existant, P and K are good. I live in central FL, my back yard is
primarily sand.

According to this web site:

http://edis.ifas.ufl.edu/LH012

The best soil amendment to use would be colloidal phosphate -
except no one around here seems to know what the heck it is! I
can't find it anywhere....

I'd like to prep my soil so that I can sow some Bahia grass seeds
this spring, but don't know what to do....

Anyone?

If your backyard is primarily sand the best thing you can do is add some
organic matter.

--

Travis in Shoreline (just North of Seattle) Washington
USDA Zone 8b
Sunset Zone 5