I’m south of Sarasota on the coast. It does get extremely dry here. Last year during the drought (we had no rainy season) the sunshine mimosa was the only green in the yard because of its 3 foot roots.
The frog fruit are in a slightly shadier area and are doing fine so far, we’ll see how they fare this summer. Both go dormant in winter and lose color but don’t go totally brown.
I hand water using well water on all of the plants until they are established, which takes a good 6 weeks. No salt intrusion in our well at this point. People hear native plants don’t need water, but they do until their roots are established and they need water in really dry periods for a good year.
Grass in FL not only takes a lot of water, but a lot of fertilizer, herbicides, pesticides and a lawn service to maintain it.
The pic below is our back side yard. It’s patches of sand, Bahai and Bermuda grass and invasive grasses. Unless grass is fertilized/watered it diminishes and lets weeds take over. I had planted a few sunshine mimosa behind the house and it’s now coming out from under the fence and going into the side yard.