Quick answer: 20 native South Carolina plants have a recorded bloom range that includes October.
20 species
- Black-eyed Susan Rudbeckia hirta · 42 states
- Blue mistflower Conoclinium coelestinum · 26 states
- Brown-eyed Susan Rudbeckia triloba · 6 states
- Cardinal flower Lobelia cardinalis · 37 states
- Carolina jessamine Gelsemium sempervirens · 9 states
- Cutleaf coneflower Rudbeckia laciniata · 21 states
- Dotted blazing star Liatris punctata · 10 states
- Great blue lobelia Lobelia siphilitica · 32 states
- Loblolly bay Gordonia lasianthus · 5 states
- Longleaf pine Pinus palustris · 6 states
- Maypop passionflower Passiflora incarnata · 13 states
- New England aster Symphyotrichum novae-angliae · 18 states
- Prairie blazing star Liatris pycnostachya · 16 states
- Scarlet beebalm Monarda didyma · 18 states
- Spotted beebalm Monarda punctata · 14 states
- Swamp milkweed Asclepias incarnata · 25 states
- Swamp sunflower Helianthus angustifolius · 15 states
- Virginia saltmarsh mallow Kosteletzkya pentacarpos · 4 states
- White snakeroot Ageratina altissima · 7 states
- Witch-hazel Hamamelis virginiana · 28 states