When it comes to landscaping in Houston, Texas, it's important to choose plants that are well-adapted to the region's hot and humid climate. Here are a few additional recommendations for Houston landscaping:

1. Indian Hawthorn (Rhaphiolepis indica): This evergreen shrub produces clusters of pink or white flowers and can add color and texture to your landscape. It is drought-tolerant and can handle Houston's heat.
2. Texas Mountain Laurel (Sophora secundiflora): A small tree or large shrub, it features fragrant purple flowers in the spring. It is drought-tolerant and can tolerate a wide range of soil conditions.
3. Esperanza (Tecoma stans): This heat-loving perennial shrub produces clusters of vibrant yellow flowers throughout the summer. It attracts butterflies and thrives in full sun.
4. Mexican Honeysuckle (Justicia spicigera): This perennial shrub has orange tubular flowers that attract hummingbirds and butterflies. It is drought-tolerant and prefers full sun to part shade.
5. Turk's Cap (Malvaviscus arboreus): This native perennial produces bright red flowers that resemble a turban, hence its name. It attracts hummingbirds and can thrive in both sun and shade.
6. Gulf Coast Penstemon (Penstemon tenuis): This native perennial features tubular pink or purple flowers and attracts hummingbirds. It prefers well-draining soil and can tolerate drought.
7. Mexican Petunia (Ruellia brittoniana): This evergreen perennial produces purple or pink flowers throughout the summer. It is low-maintenance and can tolerate a variety of soil conditions.
8. Big Muhly Grass (Muhlenbergia lindheimeri): This ornamental grass is known for its large, fluffy plumes that appear in the fall. It adds texture and movement to the landscape and is drought-tolerant.
9. Rock Rose (Pavonia lasiopetala): This small shrub produces pink flowers with a dark red center. It attracts butterflies and is drought-tolerant.
10. Texas Star Hibiscus (Hibiscus coccineus): This perennial shrub produces large red flowers and attracts hummingbirds. It prefers full sun and moist soil.  

Remember to consider factors such as sun exposure, soil drainage, and water requirements when selecting plants for your Houston landscaping. It's also a good idea to consult with local nurseries or landscape professionals like purposed landscaping for finalized ideas.