North America Native Plant

Bastard Oak

Botanical name: Quercus sinuata var. sinuata

USDA symbol: QUSIS

Life cycle: perennial

Habit: shrub

Native status: Native to the lower 48 states  

Synonyms: Quercus durandii Buckley (QUDU2)   

Bastard Oak: A Tough Native Shrub for Southern Gardens Don’t let the unflattering name fool you – the bastard oak (Quercus sinuata var. sinuata) is actually a charming native shrub that deserves a place in southern gardens. This hardy member of the oak family brings all the benefits of larger ...

Bastard Oak: A Tough Native Shrub for Southern Gardens

Don’t let the unflattering name fool you – the bastard oak (Quercus sinuata var. sinuata) is actually a charming native shrub that deserves a place in southern gardens. This hardy member of the oak family brings all the benefits of larger oaks in a more manageable, shrub-sized package.

What Is Bastard Oak?

Bastard oak is a perennial, multi-stemmed woody shrub native to the southeastern United States. Also known by its synonym Quercus durandii, this oak typically grows to less than 13-16 feet in height, though it can occasionally grow taller or develop a single stem depending on growing conditions. Like all oaks, it’s a long-lived plant that will grace your garden for decades.

Where Does It Grow Naturally?

This native beauty calls the southeastern coastal plain home, naturally occurring across Alabama, Arkansas, Florida, Georgia, Louisiana, Mississippi, South Carolina, and Texas. It thrives in the lower elevations and coastal areas of these states, making it perfectly adapted to southern growing conditions.

Why Choose Bastard Oak for Your Garden?

There are plenty of reasons to consider adding this native shrub to your landscape:

  • True native plant: Supports local ecosystems and wildlife
  • Manageable size: All the benefits of an oak without the massive size
  • Low maintenance: Once established, it’s quite drought tolerant
  • Wildlife value: Produces acorns for wildlife and supports numerous insects
  • Attractive foliage: Classic lobed oak leaves with seasonal interest

Perfect Garden Settings

Bastard oak shines in several garden styles:

  • Native plant gardens: A natural choice for authentic regional plantings
  • Woodland gardens: Excellent as an understory shrub beneath taller trees
  • Wildlife gardens: Provides food and habitat for birds and other creatures
  • Naturalistic landscapes: Perfect for informal, low-maintenance designs

Growing Conditions and Care

One of the best things about bastard oak is how adaptable it is to different growing conditions. Here’s what it prefers:

  • Sunlight: Partial shade to full sun
  • Soil: Well-drained soils of various types
  • Water: Drought tolerant once established, but benefits from regular watering the first year
  • Climate: Hardy in USDA zones 7-9

Planting and Care Tips

Getting your bastard oak off to a good start is straightforward:

  • Best planting time: Fall or spring when temperatures are mild
  • Spacing: Allow room for the shrub to reach its mature size
  • Watering: Water regularly during the first growing season to establish deep roots
  • Pruning: Minimal pruning needed – just remove dead or damaged branches
  • Fertilizer: Generally unnecessary in most soils

Supporting Wildlife

Like all native oaks, bastard oak is a wildlife powerhouse. The acorns it produces provide food for numerous birds and mammals, while the leaves support countless insects that in turn feed birds and other wildlife. By planting this native shrub, you’re creating a mini ecosystem in your own backyard.

Is Bastard Oak Right for You?

If you’re gardening in the southeastern United States and want a low-maintenance, wildlife-friendly shrub that truly belongs in your local ecosystem, bastard oak could be perfect. It’s especially ideal if you’re looking to create naturalistic plantings or add authentic native plants to your landscape. Just remember that like all oaks, it’s a long-term commitment – but that’s part of its charm!

This unassuming native shrub proves that sometimes the best garden plants are the ones that have been thriving in your region for thousands of years. Give bastard oak a try, and you might just discover your new favorite native plant.

Bastard Oak

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Hamamelididae

Order

Fagales

Family

Fagaceae Dumort. - Beech family

Genus

Quercus L. - oak

Species

Quercus sinuata Walter - bastard oak

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA