Boerne Chapter

Hot-weather wildflowers blossoming

Headshot of senior man.

By Bill Ward

Published in The Boerne Star on September 5, 2003

When protected from deer, several kinds of wildflowers just naturally sprout up in our backyard. Three falls ago we supplemented our indigenous crop with various wildflower seeds purchased from Native American Seed in Junction.

Of course, we bought seeds only for the native plants that are supposed to do well in this part of the Hill Country, and they did. Also, we have planted several kinds of salvias, mostly natives of Texas and northeastern Mexico.

Having a wildflower patch in place of a traditional backyard brings us a lot of pleasure through most of the year. It also brings a little consternation from time to time.

The nicest thing about our backyard is that from early spring to early winter we have a kitchen table vista of ever-changing color and texture. Just about the time the first bluebonnets start to flower, the agarita bushes are covered with tiny yellow flowers and the Texas mountain laurel is hanging with “grape clusters” of purple blooms.

Within a few days the patch of bluebonnet blue has spread wide, and here and there are spots of prairie verbena purple, Englemann daisy yellow, and gaura pink.

As the bluebonnets fade, more yellow flowers bloom. Then an orange cast spreads across the yard when more and more Indian blankets open.

In time, purple and blue patches dominate the scene as purple horsemint and mealy blue sage come into full bloom. Meanwhile, standing cypress has sent up red spires all over the yard.

And so it goes, continuously changing colors, through the summer and into the fall.

Our fall flowers often eclipse the spring blooms. especially when the late-summer rains are ample.

To tell the truth, this idyllic progression of color is not without its less-attractive periods that try our patience. Our first challenge is to wait for the withering bluebonnets to pop their seeds before we pull up the unsightly gray-brown remains.

The same is true for most of the other flowers. We often have to concentrate on what is currently blooming through the dying branches of earlier flowers.

And then there are the summer doldrums, when too much of the backyard tends to be dry brown. This is the time which requires the most patience.

That awkward time between early summer and fall bloom periods can be mitigated by planting enough of the wildflowers that will continue to bloom no matter how hot and dry it gets.

One of my favorite hot-weather bloomers is blackfoot daisy (Melampodium leucanthum). Just last week my wife discovered that blackfoot daisy flowers have a strong perfume, at least for part of the day.

That plant grows so close to the ground that we never smelled the flowers before.

Other Hill Country wildflowers that bloom through the August heat in our yard are common sunflowers (Helianthus annuus), Texas greeneyes (Berlandiera texana), rose pavonia (Pavonia lasiopetala), Turk’s cap (Malvaviscus drummondii), flame acanthus (Anisacanthus wrightii), and snow-on-the-mountain (Euphorbia marinata).

Bush sunflower (Simsia calva) continues to bloom except during the driest period.

Strangely enough, many of our Indian blankets (Gaillardia pulchella), which grew from seed we planted, will bloom all summer and right up until a hard frost, especially if given an occasional watering when it is very hot and dry.

They’ve done that for three years now.

The South and West Texas native yellow bells or esperanza (Tecoma stans) flowers profusely all summer and fall. Two native-compatible exotics that bloom well during the summer heat are indigo spires (a Salvia hybrid) and Mexican oregano (Poliomintha longiflora). Another plus for these last two is that deer ignore them.

About the Region

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Salado, the location of our Fall 2025 Symposium, lies at the intersection of two ecoregions: the Edwards Plateau (Limestone Cut Plain) and Blackland Prairie (Northern Blackland Prairie).

The Edwards Plateau area is also called the Hill Country; however, this general term covers a much larger area extending farther north. Spring-fed creeks are found throughout the region; deep limestone canyons, rivers, and lakes (reservoirs) are common. Ashe juniper is perhaps the most common woody species found throughout the region. Additional woody species include various species of oak, with live oak (Quercus fusiformis) being the most common. Sycamores (Platanus occidentalis) and bald cypress (Taxodium distichum) border waterways. This area is well known for its spring wildflower displays, though they may be viewed in spring, late summer, and fall, as well. According to Texas Parks and Wildlife, average annual rainfall in the Edwards Plateau ranges from 15 to 34 inches.

The Blackland Prairie extends from the Red River south to San Antonio, bordered on the west by the Edwards Plateau and the Cross Timbers, and on the east by the Post Oak Savannah. Annual rainfall averages 30 to 40 inches, with higher averages to the east. This region is dominated by prairie species. The most common grass species include little bluestem (Schizachyrium scoparium) and Indian grass (Sorghastrum nutans) in the uplands and switchgrass (Panicum virgatum) in the riparian areas and drainages. Common herbaceous flowering plants include salvias, penstemons, and silphiums. This area has suffered greatly from overgrazing and agricultural use. Few intact areas remain, though many of the plants can be found along county roadsides throughout the region.

Our fall Symposium host chapter, the Tonkawa Chapter, includes both of these ecoregions.

Source: Wildflowers of Texasย by Michael Eason