One of the nice things about living here in the south is proximity to places that are interesting or beneficial for gardeners. There are garden shops nearby where you could buy plenty of garden plants typically used for landscaping. They may not have the unusual plants and vines that Centris has, but they have a modest selection of lawn grasses that you can buy.
And then there are places where you can get animal manure as organic fertilizer practically for free. We've gone to my daughter's university (specializing in agricultural sciences) to just
shovel cow manure fertilizer. This is aged manure, by the way and so there is no offensive odor.
