A native shrub beloved by pollinators as well as gardeners, Texas rock rose is carefree and versatile. Its hibiscus-like pink- to rose-colored flowers bejewel the shrubby perennial from midsummer through fall. It provides months of easy-care color even in droughts and high temperatures.
Texas rock rose is commonly a short-lived shrub. It generally grows well in one location for three to six years before it dies out. It attracts bees, birds, hummingbirds, and butterflies, so it’s a great addition to a pollinator garden.
Texas Rock Rose Overview
Where to Plant Texas Rock Rose
Plant Texas rock rose in full sun and well-drained soil. The shrub can adapt to a wide pH range but does best in neutral to slightly alkaline limestone soil.
This low-growing shrub has multiple landscape uses: foundation plantings, perennial borders, along walkways and curbsides, native plant gardens, cottage-style gardens, and rock gardens. It is particularly attractive in groups or mass plantings. Because Texas rock rose is drought-tolerant, it is also suitable for xeriscapes.
How and When to Plant Texas Rock Rose
Nursery-grown transplants can be planted from early spring through fall. Earlier planting is better as it gives the plant time to develop a strong root system before the winter.
Dig a hole at least twice the size of the root ball and just as deep. Place the shrub in the hole and backfill it with the original soil so that the top of the root ball is flush with the soil. Tamp down the soil and water it well. Keep the soil moist and water it regularly during the first growing season to encourage a strong root system. Spread a 2-inch-thick layer of mulch around the base of new plants.
Space plants 3 to 5 feet apart.
Texas Rock Rose Care Tips
This is a low-maintenance shrub that was selected as a Texas Superstar plant.
Light
Rock rose grows and flowers best in full sun or light shade.
Soil and Water
This native shrub is exceptionally tolerant of all sorts of soil conditions. Originating in the dry, rocky woods and banks of Texas, rock rose can grow in dry, lean soil but it grows taller in soil with good fertility. A soil pH between 6.6 and 7.8 is ideal.
Water the plant regularly during the first growing season to encourage root growth. Once established, it is drought-tolerant. Avoid overwatering; especially wet roots during the winter are detrimental to the plant.
Temperature and Humidity
Texas rock rose is only hardy to Zones 8 and 9 but in cooler climates, it can be grown as an annual or in containers and overwintered indoors. It tolerates both heat and humidity.
Fertilizer
It is not essential to fertilize Texas rock rose—in its native habitat, it even grows in poor soil—but a one-time application of a complete balanced slow-release fertilizer in the spring as the new growth starts will benefit the plant.
Pruning
Texas rock rose grows naturally in a loose, open mound. You can either shear the plant back by a few inches every month or so (shearing promotes new growth and more flowers), or, if the plant becomes lanky in midsummer, you can cut it back by one-third.
In the late winter or early spring, rejuvenate Texas rock rose by pruning it back to about 6 inches above the soil.
Potting and Repotting Texas Rock Rose
Because it is a fairly small shrub, Texas rock rose can be grown in a container that is at least 12 inches in diameter and has large drainage holes. Use well-draining potting mix and keep in mind that container plants, unlike the same plants in the landscape, need more frequent watering.
The shrub will need repotting to a larger pot when the roots have reached the sides or grow out of the drainage holes. Move it to the next largest size container and add fresh potting soil before transplanting the shrub.
Pests and Problems
The shrub rarely has serious pest or disease issues. In shady locations, it is prone to getting powdery mildew.
How to Propagate Texas Rock Rose
Texas rock rose can be propagated from softwood cuttings. In the spring before the bloom starts, cut a 3- to 6-inch stem tip, preferably one without any flower buds. Strip it of all but the top leaves and dip the cut end in rooting hormone. Insert the cutting about 1 inch deep in a 4-inch pot filled with damp potting mix and keep it evenly moist in a warm, humid location. Once you see new growth and the cutting does not wiggle when you tug on it, it has begun rooting. Let it grow into a strong seedling before transplanting it into the landscape.
Texas Rock Rose Companion Plants
Agave
With its eye-catching foliage, agave adds drama and geometry to any garden. There are many types to choose from in a wide range of sizes, shapes, colors, and textures, including native varieties such as the American agave (Agave americana). Zone 5-11
Autumn Sage
Salvia gregii is a low-growing, drought-tolerant shrub with red, pink, purple, orange, or white flowers. Autumn sage is native to Texas and Mexico where it grows mostly on rocky slopes. Zone 7-9
Yucca
Yucca needs full sun. It can stand up to some serious drought so it works well in xeriscaping. The leaves come in a variety of colors, most often a silvery green. You can also find them in variegated varieties with gold, green, cream, blue, and even pink, in the right season. If possible, choose a yucca species that is native to your area. Zone 5-11
Frequently Asked Questions
- How to you overwinter Texas rock rose indoors?Bring the container indoors before the first killing frost. Place it in a bright, cool location and water it sparingly during its winter dormancy, giving it just enough water so the soil does not dry out.
Bring the container indoors before the first killing frost. Place it in a bright, cool location and water it sparingly during its winter dormancy, giving it just enough water so the soil does not dry out.
- Does Texas rock rose self-seed?Yes, it self-seeds. Since the plant is not very long-lived, you might want to let some of the volunteer seedlings grow so you always have rock roses in your landscape. Just remove seedlings that are beyond the desired planting area.
Yes, it self-seeds. Since the plant is not very long-lived, you might want to let some of the volunteer seedlings grow so you always have rock roses in your landscape. Just remove seedlings that are beyond the desired planting area.