Grows well well north of its native range.  Documented in very southern counties with an outlier in Martin County -- that outlier is also unique in that it was collected near a cypress dome. Closely related to corn, this species has been crossed with maize to produce a corn that is resistant to Helminthosporium turcicum, the fungus that causes northern leaf blight  (Wikipedia). Listed as Threatened in Florida. Informal borders.

Very easily grown. Flowers are fairly small but very numerous. Plant on a trellis or fence.

Informal shady semi-shady gardens.

Primarily useful for coastal restoration projects.

Understory tree, use as a background plant or screen.

Specimen shrub. Fine foliage. Does well adjacent to structures or woods.

This is a protected plant as it is of major importance to the stabilization of beach dunes. Specimen plant. Mass plantings on beach dunes for stabilization. Seed heads useful in dried arrangements.

Hedges, screens.

Called elephant's foot because of the flat basal leaf formation. Meadows and wildflower gardens.

Has considerable winter interest as its bark is smooth and red. Wet site hedge, wet site specimen plant especially if a clump is suitable.Rarely planted but considerable value especially in areas where most shrubs are bare during the winter.

Foliage is fine-textured. Fast growing. Subject to root problems in poorly drained areas. Highly flammible and old trees are weak.  Think twice about placing a building in a sand pine forest. Forest plantings for dry sites, specimen tree. Best not planted adjacent to buildings.

In a managed garden, gamagrass can be trimmed back at the end of winter. Hedge, foundation planting, individual large grass clump, background screen for a flower garden. Rain garden or bioswale.

Curiosity in wetland gardens.