Also need to know if I can transplant St. Augustine to areas of the the garden where the former owner's dog killed the grass and just dirt is there.

Thanks a million everyone!

Brenda

Nadine's answer makes good sense to me (iron defeciency). Bought present home 6mo ago and started organic progam but have small areas in lawn where leaves are light green to yellow. Have highly alkaline soil. After researching for couple of months all the evidence points to "Iron Chlorisis". I am applying green sand today and I bet it works.
John T