If you want to add beautiful color to your yard with minimal work, check out these options! (contains affiliate links)
Texas Sage

Texas Sage (Leucophyllum frutescens)
Silvery foliage, purple flowers, and ultra heat-tolerant. It's practically the poster child for Texas landscaping. Needs little to no watering once established.
Autumn Sage

Autumn Sage (Salvia greggii)
Long-lasting color in red, pink, purple, and white. Attracts pollinators and survives harsh droughts.
Turk's Cap

Turk’s Cap (Malvaviscus arboreus var. drummondii)
Shade-tolerant and blooms summer to fall. Great for wildlife and very low water needs once established.
Lantana

Lantana (Lantana camara or Lantana urticoides)
Hardy, colorful groundcover or small shrub. Blooms nonstop and tolerates heat like a champ.
Rock Rose

Rock Rose (Pavonia lasiopetala)
Texas native with hibiscus-like pink flowers. Thrives in rocky, dry soil with minimal care.
Red Yucca

Red Yucca (Hesperaloe parviflora)
Evergreen succulent with red-pink flower stalks. Super tough and great for architectural interest.
Gregg's Mistflower

Gregg’s Mistflower (Conoclinium greggii)
Soft purple blooms that butterflies love. Tolerates drought and comes back reliably every spring.
Esperanza

Esperanza (Tecoma stans)
Big, bright yellow flowers. Heat-lover that acts like a perennial in most parts of Texas (cut back after frost).
Four-Nerve Daisy

Four-Nerve Daisy (Tetraneuris scaposa)
Low-growing, sunny-yellow blooms nearly year-round. Native and thrives in poor, dry soils.
Mealy Blue Sage

Mealy Blue Sage (Salvia farinacea)
Tough perennial with spiky blue-purple flowers. Perfect for pollinator gardens and drought-prone spots.