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North America Native Plant

Tamaulipas Amaranth

Tamaulipas Amaranth: A Humble Native with Big Ecological Impact If you’re looking for a native plant that puts ecology over ego, meet Tamaulipas amaranth (Amaranthus tamaulipensis). This unassuming annual might not win any beauty contests, but it’s a hardworking member of the native plant community that deserves a spot in ...

Tamaulipas Amaranth: A Humble Native with Big Ecological Impact

If you’re looking for a native plant that puts ecology over ego, meet Tamaulipas amaranth (Amaranthus tamaulipensis). This unassuming annual might not win any beauty contests, but it’s a hardworking member of the native plant community that deserves a spot in wildlife-focused gardens across South Texas.

What is Tamaulipas Amaranth?

Tamaulipas amaranth is a native annual forb—basically a non-woody plant that completes its entire life cycle in one growing season. As a member of the amaranth family, it shares traits with its more famous cousins like grain amaranth and pigweed, but this species has carved out its own niche in the wild landscapes of South Texas.

Don’t expect flashy flowers or Instagram-worthy foliage. This plant is all about function over form, producing small, dense clusters of tiny greenish flowers that eventually develop into seeds that local wildlife absolutely love.

Where Does It Call Home?

True to its name, Tamaulipas amaranth is native to Texas, specifically the southern regions where it naturally occurs in the wild. Its range extends slightly into northeastern Mexico, particularly the Tamaulipas region, which gives this plant its common name.

Why Grow Tamaulipas Amaranth?

Let’s be honest—you’re probably not growing this plant for its stunning visual appeal. Here’s why you might want it in your garden anyway:

  • Native wildlife support: The seeds provide food for birds and small mammals throughout fall and winter
  • Zero-maintenance gardening: Once established, it pretty much takes care of itself
  • Drought tolerance: Perfect for xeriscaping and low-water gardens
  • Ecological authenticity: Adds genuine native biodiversity to your landscape
  • Self-seeding: Will naturalize in appropriate conditions, creating sustainable habitat

Growing Conditions and Care

Tamaulipas amaranth is adapted to USDA hardiness zones 9-10, making it suitable for South Texas gardens and similar climates. Here’s what this easy-going native prefers:

  • Sunlight: Full sun for best growth and seed production
  • Soil: Well-draining soils; tolerates poor, sandy, or rocky conditions
  • Water: Drought tolerant once established; minimal supplemental watering needed
  • Space: Allow room for natural spreading and self-seeding

Planting and Care Tips

Growing Tamaulipas amaranth is refreshingly simple:

  • Direct seed in spring after the last frost
  • Scatter seeds in prepared soil and lightly cover
  • Water gently until germination occurs
  • Once established, let nature take the wheel
  • Allow plants to go to seed to feed wildlife and ensure next year’s generation

Garden Design Role

This isn’t a plant for formal gardens or showy borders. Instead, consider Tamaulipas amaranth for:

  • Native plant gardens focused on ecological function
  • Wildlife habitat restoration projects
  • Naturalized areas where you want authentic native vegetation
  • Xeriscaping projects in appropriate climate zones
  • Background plantings where its modest appearance won’t compete with showier natives

The Bottom Line

Tamaulipas amaranth won’t make your neighbors stop and stare, but it will make your local birds and wildlife very happy. If you’re committed to supporting native ecosystems and don’t mind trading flashy flowers for authentic ecological value, this humble annual deserves consideration.

For South Texas gardeners especially, including natives like Tamaulipas amaranth helps create landscapes that truly reflect and support the unique character of your region. Sometimes the most valuable plants are the ones that work quietly behind the scenes, and this little amaranth is a perfect example of that gardening philosophy.

Tamaulipas Amaranth

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Caryophyllidae

Order

Caryophyllales

Family

Amaranthaceae Martinov - Amaranth family

Genus

Amaranthus L. - pigweed

Species

Amaranthus tamaulipensis Henrickson - Tamaulipas amaranth

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