North America Non-native Plant

Trichocereus Auricolor

Botanical name: Trichocereus auricolor

USDA symbol: TRAU12

Native status: Not native but doesn't reproduce and persist in the wild

The Mysterious Trichocereus auricolor: A Rare Cactus Worth Investigating If you’ve stumbled across the name Trichocereus auricolor in your plant research, you’ve discovered one of the more enigmatic members of the cactus world. This species belongs to the Trichocereus genus, known for their impressive columnar cacti, but finding detailed information ...

The Mysterious Trichocereus auricolor: A Rare Cactus Worth Investigating

If you’ve stumbled across the name Trichocereus auricolor in your plant research, you’ve discovered one of the more enigmatic members of the cactus world. This species belongs to the Trichocereus genus, known for their impressive columnar cacti, but finding detailed information about T. auricolor specifically can be quite the treasure hunt.

What We Know (And Don’t Know)

Here’s where things get interesting – and a bit mysterious. Trichocereus auricolor appears to be either extremely rare, newly described, or possibly a name that’s been used inconsistently in botanical circles. Unlike its well-documented cousins in the Trichocereus family, this particular species keeps a low profile in gardening and botanical literature.

The genus Trichocereus is typically associated with South American origins, particularly the Andes mountains, though we cannot confirm the specific native range of T. auricolor without more research.

Should You Plant It?

This is where we need to pump the brakes a bit. Given the limited information available about Trichocereus auricolor, we’d recommend taking a cautious approach:

  • Verify the plant’s identity with multiple reputable sources before purchasing
  • Ensure any plant material comes from responsible, legal sources
  • Consider whether this might be a mislabeled or hybrid specimen
  • Research local regulations about importing or growing cacti species

If You’re Set on Growing It

Should you manage to source authentic Trichocereus auricolor, you’ll likely want to follow general care guidelines for the Trichocereus genus, though we can’t make specific recommendations without more species data:

  • Most Trichocereus species prefer well-draining, sandy soil
  • They typically enjoy full sun to partial shade
  • Watering should be infrequent but thorough
  • Cold tolerance varies by species within the genus

Consider These Alternatives

If you’re drawn to columnar cacti but want something with more established growing information, consider these well-documented options:

  • Trichocereus pachanoi (San Pedro cactus)
  • Trichocereus grandiflorus
  • Native cacti species appropriate for your region

The Bottom Line

Trichocereus auricolor remains something of a botanical puzzle. While the mystery surrounding this species might appeal to collectors and enthusiasts, most gardeners would be better served by choosing well-documented cacti with clear care requirements and known growing habits.

If you do encounter this species, we’d love to hear about your experience! The plant world is always evolving, and every gardener’s observations contribute to our collective knowledge of these fascinating desert dwellers.

Remember: when in doubt, choose native plants for your region or well-established species with proven track records in cultivation. Your garden (and local ecosystem) will thank you for it.

Trichocereus Auricolor

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

Cactaceae Juss. - Cactus family

Genus

Trichocereus (A. Berger) Riccob. - trichocereus

Species

Trichocereus auricolor Backeb.

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