Quick answer: 62 native Texas plants have a recorded bloom range that includes March.
62 species
- Agarita Mahonia trifoliolata · 1 states
- American elm Ulmus americana · 4 states
- American holly Ilex opaca · 24 states
- American hornbeam Carpinus caroliniana · 29 states
- American sycamore Platanus occidentalis · 24 states
- Antelope-horns milkweed Asclepias asperula · 2 states
- Autumn sage Salvia greggii · 2 states
- Blackjack oak Quercus marilandica · 3 states
- Boxelder Acer negundo · 14 states
- Bur oak Quercus macrocarpa · 24 states
- Carolina jessamine Gelsemium sempervirens · 9 states
- Chinkapin oak Quercus muehlenbergii · 14 states
- Coral bean Erythrina herbacea · 6 states
- Coral honeysuckle Lonicera sempervirens · 16 states
- Creosote bush Larrea tridentata · 5 states
- Crossvine Bignonia capreolata · 5 states
- Desert marigold Baileya multiradiata · 4 states
- Drummond phlox Phlox drummondii · 1 states
- Eastern cottonwood Populus deltoides · 14 states
- Eastern red cedar Juniperus virginiana · 36 states
- Eastern red columbine Aquilegia canadensis · 36 states
- Eastern redbud Cercis canadensis · 30 states
- Farkleberry Vaccinium arboreum · 5 states
- Flowering dogwood Cornus florida · 22 states
- Honey mesquite Prosopis glandulosa · 3 states
- Huisache Vachellia farnesiana · 1 states
- Loblolly pine Pinus taeda · 14 states
- Longleaf pine Pinus palustris · 6 states
- Mayapple Podophyllum peltatum · 18 states
- Maypop passionflower Passiflora incarnata · 13 states
- Mexican buckeye Ungnadia speciosa · 2 states
- Mexican olive Cordia boissieri · 1 states
- Mexican plum Prunus mexicana · 4 states
- Mountain azalea Rhododendron canescens · 9 states
- New Jersey tea Ceanothus americanus · 31 states
- Northern spicebush Lindera benzoin · 16 states
- Ocotillo Fouquieria splendens · 3 states
- Ohio buckeye Aesculus glabra · 12 states
- Pink evening primrose Oenothera speciosa · 8 states
- Possumhaw Ilex decidua · 7 states
- Post oak Quercus stellata · 9 states
- Quaking aspen Populus tremuloides · 24 states
- Red buckeye Aesculus pavia · 9 states
- Red maple Acer rubrum · 30 states
- Red yucca Hesperaloe parviflora · 2 states
- River birch Betula nigra · 23 states
- Sassafras Sassafras albidum · 22 states
- Scarlet sage Salvia coccinea · 3 states
- Shortleaf pine Pinus echinata · 9 states
- Shumard oak Quercus shumardii · 5 states
- Southern live oak Quercus virginiana · 13 states
- Southern red oak Quercus falcata · 6 states
- Sweetgum Liquidambar styraciflua · 22 states
- Texas bluebonnet (state flower) Lupinus texensis · 2 states
- Texas mountain laurel Dermatophyllum secundiflorum · 1 states
- Texas persimmon Diospyros texana · 1 states
- Texas sacahuista Nolina texana · 1 states
- White oak Quercus alba · 33 states
- Wild blue Phlox divaricata · 32 states
- Willow oak Quercus phellos · 16 states
- Winecup Callirhoe involucrata · 7 states
- Yellow necklacepod Sophora tomentosa · 1 states