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Rain Garden Plants for Texas
Updated 2026-09-11
A rain garden holds stormwater runoff long enough for it to soak in rather than run off, which means the plants in it need to tolerate both occasional standing water and the dry stretches between rains that are just as normal in Texas. The 5 species here handle that swing better than most natives on the site.
5 plants
Cardinal Flower
Lobelia cardinalis
Spikes of the most intense scarlet of any native flower, rising from moist shade in late summer.
Inland Sea Oats
Chasmanthium latifolium
The rare ornamental grass that thrives in shade, dangling flat, papery seed heads that shift from green to bronze and rustle all winter.
Possumhaw Holly
Ilex decidua
Drops its leaves in fall to reveal branches packed with scarlet berries that glow through winter and feed cedar waxwings and robins in late season..
Switchgrass
Panicum virgatum
An upright prairie grass with airy pink-bronze seed clouds and gold fall color.
Wax Myrtle
Morella cerifera
A fast, dense, aromatic evergreen that makes an ideal privacy screen and fixes its own nitrogen.
Built for wet-dry swings, not constant moisture
Cardinal flower is the one plant here that actually wants consistently moist soil and struggles if a rain garden's basin dries out completely for too long, which makes it better suited to the wettest part of the basin, at the bottom where water collects. Possumhaw holly and wax myrtle both shrug off a heavy clay soil that stays soggy after a storm, without needing that moisture to thrive, which is what makes them useful at the basin's edges rather than its center. Inland sea oats and switchgrass round out the list as the grasses, both handling a periodically flooded spot as easily as an ordinary bed.
Placing plants by how wet each spot gets
A rain garden basin isn't uniformly wet. The lowest point holds water longest after a storm and dries out slowest, which is where cardinal flower's higher water need is actually an advantage rather than a risk. The upper edges of the basin flood only briefly and dry out fastest, better suited to possumhaw holly, wax myrtle, inland sea oats, and switchgrass, all of which tolerate occasional flooding but don't require it.
FAQ
What native Texas plants tolerate both flooding and drought?
Possumhaw holly, wax myrtle, inland sea oats, and switchgrass all handle occasional standing water and dry spells between rains, which is exactly the swing a rain garden basin sees.
Where should I plant cardinal flower in a rain garden?
At the lowest point of the basin, where water collects and the soil stays moistest longest, since it's the one plant on this list that actually wants consistent moisture rather than just tolerating occasional flooding.
Do rain garden plants need irrigation during a Texas drought?
Once established, most on this list get by on rainfall alone, though cardinal flower is the exception and may need supplemental water if the basin goes fully dry for an extended stretch.