I believe you are mistaken- this is Rocky Nook Park.  https://www.google.com/maps/@34.440796,-119.7127259,3a,50y,355.22h,82.7t/data=!3m6!1e1!3m4!1sZ6en4nZ8C-iCXR-qwtbMuA!2e0!7i16384!8i8192
The botanic garden is located about 1 mile north of here.