Quick answer: 44 native Florida plants have a recorded bloom range that includes September.
44 species
- Beach sunflower Helianthus debilis · 1 states
- Big bluestem Andropogon gerardii · 25 states
- Black-eyed Susan Rudbeckia hirta · 42 states
- Blue mistflower Conoclinium coelestinum · 26 states
- Brown-eyed Susan Rudbeckia triloba · 6 states
- Butterflyweed Asclepias tuberosa · 37 states
- Cardinal flower Lobelia cardinalis · 37 states
- Carolina jessamine Gelsemium sempervirens · 9 states
- Cocoplum Chrysobalanus icaco · 1 states
- Common buttonbush Cephalanthus occidentalis · 23 states
- Common yarrow Achillea millefolium · 31 states
- Crimson-eyed rose-mallow Hibiscus moscheutos · 14 states
- Dense blazing star Liatris spicata · 15 states
- Devil's walking stick Aralia spinosa · 14 states
- Eastern purple coneflower Echinacea purpurea · 22 states
- Grayhead coneflower Ratibida pinnata · 12 states
- Groundnut Apios americana · 1 states
- Groundsel tree Baccharis halimifolia · 2 states
- Indiangrass Sorghastrum nutans · 19 states
- Inkberry Ilex glabra · 4 states
- Inland sea oats Chasmanthium latifolium · 3 states
- Leavenworth's tickseed Coreopsis leavenworthii · 1 states
- Little bluestem Schizachyrium scoparium · 23 states
- Longleaf pine Pinus palustris · 6 states
- Maypop passionflower Passiflora incarnata · 13 states
- New York ironweed Vernonia noveboracensis · 3 states
- Orange coneflower Rudbeckia fulgida · 2 states
- Partridge pea Chamaecrista fasciculata · 13 states
- Partridgeberry Mitchella repens · 17 states
- Pink-scale blazing star Liatris elegans · 5 states
- Scarlet rosemallow Hibiscus coccineus · 5 states
- Scarlet sage Salvia coccinea · 3 states
- Seaside goldenrod Solidago sempervirens · 2 states
- Smooth oxeye Heliopsis helianthoides · 12 states
- Spotted beebalm Monarda punctata · 14 states
- Stokes aster Stokesia laevis · 4 states
- Swamp milkweed Asclepias incarnata · 25 states
- Swamp sunflower Helianthus angustifolius · 15 states
- Switchgrass Panicum virgatum · 24 states
- Trumpet vine Campsis radicans · 24 states
- Virgin's bower Clematis virginiana · 2 states
- White doll's daisy Boltonia asteroides · 1 states
- Witch-hazel Hamamelis virginiana · 28 states
- Yellow passionflower Passiflora lutea · 2 states