jnstropic

The pink mallow is a different species. Ours is Hibiscus coccineus
Common Names: scarlet hibiscus, scarlet rose mallow
Family: Malvaceae (mallow Family)
Description
The scarlet hibiscus is a slender shrubby herbaceous perennial that dies back in winter and re-sprouts in spring. Established plants can have one to several stems up to 7 ft (2.1 m) tall. The five petaled flowers are brilliant crimson red and 6-8 in (2.4-3.2 cm)across. Each lasts only a day but new ones continue to open all summer and fall. The leaves are divided palmately (like the fingers on a hand) into 3-7 narrow, pointed, serrated lobes.

Location
The scarlet hibiscus occurs naturally in swamps, marshes and ditches, from southern Georgia and Alabama to central Florida. It is often encountered along southern rivers and streams where it towers above the maidencane and pickerelweed (Pontederia cordata). My information doesn't mention being in Texas. Maybe the Texas species is an other species. But it sure looks like Hibiscus coccineus

Culture
Light: Does best in full sun.
Moisture: Likes a moist soil and can tolerate flooding. Established plants will survive in normal soils without supplementary watering, but they need to be watered during dry spells if you want them to flower.
Hardiness: USDA Zones 7 - 11
Propagation: By seeds or root division. Seeds should be punctured with a needle or scraped with a file before planting.

The spectacular scarlet hibiscus flower color coordinates pleasingly with red tinged stems and leaves.

Usage
The scarlet hibiscus makes an eye-catching specimen in the landscape with its huge crimson flowers and handsome palmate leaves. Plant them next to a pond or water garden, or at the back of a bed where their elegant leaves and brilliant flowers will attract the eye.