Where to see wildflowers in East Texas Late winter annuals and perennials lead the 2021 flora parade along Texas highways and state lands within our diverse ecoregions and vernal landscapes. Author: Reagan Roy Updated: 10:45 AM CDT April 5, 2021 TYLER, Texas — Spring is here and that means we're ushering in Texas’ amazing spring wildflower season. Late winter annuals and perennials lead the 2021 flora parade along Texas highways and state lands within our diverse ecoregions and vernal landscapes. Texas bluebonnets typically peak at the end of March through mid-April. Bluebonnets often start blooming near Interstate 10 between San Antonio and Houston and then farther north toward the Dallas-Fort Worth Metroplex. The native range of Texas bluebonnets is primarily the Hill Country and Blackland Prairie Ecoregions, although Texans have seeded these flowers well beyond.