wrote in message
ups.com...

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'll echo what others have mentioned about adding plenty of organic matter.
Rather than concentrate on any one nutrient I would advise a broad spectrum
approach to ammending the soil.
My South Florida soil is coral rock, rock rubble, and sand. Over the years I
have added what feels like tons of organic compost, peat, manure, dried kelp
and whatever else I can get my hands on and it has helped tremendously.

It is a fair bit of a pain to dig out the larger rocks and work in the
ammendments, but each year it has gotten much easier.
As you are planning turfgrass in the area you'll only have to do a major
digging once. But add as much compost as you can get your hands on and work
it in well.


--
Toni Carroll
South Florida USA
Zone 10