60 wildflowers were recorded blooming in Louisiana in March in our iNaturalist sample; 26 of the top 50 are at their peak this month. The list is ranked by number of research-grade observations.
Top wildflowers in March

Butterweed
Crowpoison

Cross Vine
Southern Dewberry

Lyreleaf Sage

Bristle Thistle

Red Buckeye

Clasping Coneflower

Catchweed Bedstraw

Yellow Jessamine

White Clover

Mayapple
All wildflowers blooming in Louisiana in March
| # | Species | Scientific name | Family | Obs. | Peak in state |
|---|---|---|---|---|---|
| 1 | Butterweed | Packera glabella | Sunflowers, Daisies, Asters, and Allies | 335 | Mar (peak) |
| 2 | Crowpoison | Nothoscordum bivalve | amaryllis, onions, and allies | 199 | Mar (peak) |
| 3 | Cross Vine | Bignonia capreolata | bignonia family | 148 | Mar (peak) |
| 4 | Southern Dewberry | Rubus trivialis | rose family | 106 | Mar (peak) |
| 5 | Lyreleaf Sage | Salvia lyrata | Mint Family | 87 | Mar (peak) |
| 6 | Bristle Thistle | Cirsium horridulum | Sunflowers, Daisies, Asters, and Allies | 77 | Apr (rising) |
| 7 | Red Buckeye | Aesculus pavia | soapberry family | 48 | Mar (peak) |
| 8 | Clasping Coneflower | Rudbeckia amplexicaulis | Sunflowers, Daisies, Asters, and Allies | 46 | May (rising) |
| 9 | Catchweed Bedstraw | Galium aparine | madder family | 41 | Mar (peak) |
| 10 | Yellow Jessamine | Gelsemium sempervirens | Gelsemiaceae | 39 | Feb (past peak) |
| 11 | White Clover | Trifolium repens | Legumes | 38 | Apr (rising) |
| 12 | Mayapple | Podophyllum peltatum | barberry family | 29 | Mar (peak) |
| 13 | Carolina crane's-bill | Geranium carolinianum | Geranium family | 29 | Mar (peak) |
| 14 | Pinkladies | Oenothera speciosa | evening primrose family | 28 | Apr (rising) |
| 15 | Largeflower pink-sorrel | Oxalis debilis | Woodsorrel Family | 28 | Apr (rising) |
| 16 | Common Pawpaw | Asimina triloba | custard-apples | 27 | Mar (peak) |
| 17 | Field madder | Sherardia arvensis | madder family | 24 | Mar (peak) |
| 18 | Philadelphia fleabane | Erigeron philadelphicus | Sunflowers, Daisies, Asters, and Allies | 22 | Mar (peak) |
| 19 | Venus's looking-glass | Triodanis biflora | bellflower family | 22 | Apr (rising) |
| 20 | Henbit Deadnettle | Lamium amplexicaule | Mint Family | 20 | Feb (past peak) |
| 21 | White Fringetree | Chionanthus virginicus | olive family | 19 | Mar (peak) |
| 22 | Bird's Foot Violet | Viola pedata | Violet Family | 19 | Mar (peak) |
| 23 | Primrose-Leaved Violet | Viola primulifolia | Violet Family | 19 | Mar (peak) |
| 24 | Jack-in-the-Pulpit | Arisaema triphyllum | Arum Family | 18 | Mar (peak) |
| 25 | Flowering Dogwood | Cornus florida | Dogwood family | 18 | Mar (peak) |
| 26 | Three-Lobed Violet | Viola palmata | Violet Family | 17 | Mar (peak) |
| 27 | Bristly Mallow | Modiola caroliniana | Mallow and Hibiscus Family | 15 | Apr (rising) |
| 28 | Red Clover | Trifolium pratense | Legumes | 13 | Apr (rising) |
| 29 | Black Cherry | Prunus serotina | rose family | 13 | Mar (peak) |
| 30 | Partridgeberry | Mitchella repens | madder family | 13 | Apr (rising) |
| 31 | Coral Honeysuckle | Lonicera sempervirens | honeysuckle family | 13 | Apr (rising) |
| 32 | Asian mazus | Mazus pumilus | mazus family | 13 | Apr (rising) |
| 33 | Sassafras | Sassafras albidum | laurels | 12 | Mar (peak) |
| 34 | Bird's-Eye Speedwell | Veronica persica | Plantain Family | 11 | Feb (past peak) |
| 35 | Tiny Bluet | Houstonia pusilla | madder family | 11 | Feb (past peak) |
| 36 | Eastern Redbud | Cercis canadensis | Legumes | 10 | Mar (peak) |
| 37 | Ohio spiderwort | Tradescantia ohiensis | Spiderworts | 10 | Mar (peak) |
| 38 | American field pansy | Viola rafinesquei | Violet Family | 10 | Feb (past peak) |
| 39 | Bur Clover | Medicago polymorpha | Legumes | 9 | Mar (peak) |
| 40 | Japanese honeysuckle | Lonicera japonica | honeysuckle family | 9 | Apr (rising) |
| 41 | Oriental false hawksbeard | Youngia japonica | Sunflowers, Daisies, Asters, and Allies | 9 | Apr (rising) |
| 42 | Common Vetch | Vicia sativa | Legumes | 8 | Feb (past peak) |
| 43 | Black Locust | Robinia pseudoacacia | Legumes | 8 | Mar (peak) |
| 44 | Florida Hedgenettle | Stachys floridana | Mint Family | 8 | Mar (peak) |
| 45 | Tenpetal Anemone | Anemone berlandieri | buttercup family | 8 | Mar (peak) |
| 46 | Common Dandelion | Taraxacum officinale | Sunflowers, Daisies, Asters, and Allies | 7 | Feb (past peak) |
| 47 | American black elderberry | Sambucus canadensis | elder family | 7 | May (rising) |
| 48 | Virginia Springbeauty | Claytonia virginica | Pussypaw Family | 7 | Feb (past peak) |
| 49 | Blue Pigroot | Sisyrinchium micranthum | iris family | 7 | Apr (rising) |
| 50 | White beggarticks | Bidens alba | Sunflowers, Daisies, Asters, and Allies | 7 | Oct (rising) |