Host an Event Volunteer Join Tickets

Support the plant database you love!


Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

Enter a Plant Name:
Or you can choose a plant family:
Rhododendron oblongifolium (Texas azalea)
Dunatchik, David

Rhododendron oblongifolium

Rhododendron oblongifolium (Small) Millais

Texas Azalea

Ericaceae (Heath Family)



USDA Native Status: L48 (N)

A spreading shrub to 6 ft. with distinctly obovate leaves and fragrant, trumpet-shaped, pure white flowers occuring 7-12 together after the leaves.

Related to R. viscosum. Some taxonomists argue that it is not a distinct species.


From the Image Gallery

11 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Perennial
Habit: Shrub
Leaf Retention: Deciduous
Leaf Arrangement: Alternate
Leaf Complexity: Simple
Breeding System: Flowers Bisexual
Fruit Type: Capsule
Size Notes: Up to about 6 feet tall.

Bloom Information

Bloom Color: White
Bloom Time: Mar , Apr , May , Jun , Jul , Aug


USA: AR , LA , OK , TX
Native Distribution: E. TX & OK
Native Habitat: Sandy woods; sandy stream banks; sandy bog margins.

Growing Conditions

Light Requirement: Shade
Soil Moisture: Dry
Soil pH: Acidic (pH<6.8)
Soil Description: Well-drained, sandy soil.
Conditions Comments: Related to R. serrulatum and R. viscosum. Some taxonomists argue that it is not a distinct species.

Value to Beneficial Insects

Special Value to Bumble Bees

This information was provided by the Pollinator Program at The Xerces Society for Invertebrate Conservation.


Description: Combine seeds loosely with sphagnum moss and sprinkle lightly over a 2:1 perlite/peat mixture. Optimum temperatures for germination are 45-50 degrees. Transplant seedlings to acid soil with a high content of organic matter. Cultivated evergreen azaleas
Seed Treatment: No pretreatment is necessary.
Commercially Avail: yes


Bibref 1620 - Gardening with Native Plants of the South (Reprint Edition) (2009) Wasowski, S. with A. Wasowski

Search More Titles in Bibliography

Web Reference

Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Webref 1 - Texas Native Shrubs (2002) Texas A&M University Agriculture Program and Leslie Finical, Dallas Arboretum

Additional resources

USDA: Find Rhododendron oblongifolium in USDA Plants
FNA: Find Rhododendron oblongifolium in the Flora of North America (if available)
Google: Search Google for Rhododendron oblongifolium


Record Modified: 2022-10-20
Research By: TWC Staff

Go back