North America Non-native Plant

Cusqui

Botanical name: Prosopis calingastana

USDA symbol: PRCA10

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

Cusqui: A Plant to Avoid in Your Garden If you’ve come across the name cusqui (Prosopis calingastana) in your gardening research, you might be wondering whether this plant deserves a spot in your landscape. The short answer? It’s best to steer clear of this one, and here’s why. What is ...

Noxious plant alert!

Cusqui: A Plant to Avoid in Your Garden

If you’ve come across the name cusqui (Prosopis calingastana) in your gardening research, you might be wondering whether this plant deserves a spot in your landscape. The short answer? It’s best to steer clear of this one, and here’s why.

What is Cusqui?

Cusqui, scientifically known as Prosopis calingastana, belongs to the Prosopis genus, which includes various mesquite-type plants. While many plants in this family can be beneficial in their native habitats, cusqui presents some significant challenges for gardeners, particularly in the United States.

Why You Should Think Twice About Planting Cusqui

Here’s the most important thing you need to know: cusqui is classified as a noxious weed in the United States. This designation isn’t given lightly – it means this plant has been identified as harmful to the environment, economy, or public health.

When a plant receives noxious weed status, it typically means:

  • It can spread aggressively and crowd out native species
  • It may be difficult to control once established
  • It could negatively impact local ecosystems
  • There may be legal restrictions on growing or transporting it

Geographic Distribution and Native Status

While specific information about cusqui’s exact native range is limited in available documentation, plants in the Prosopis genus typically originate from arid regions. However, the lack of clear native status information for this particular species, combined with its noxious classification, raises red flags for potential gardeners.

Better Alternatives for Your Garden

Instead of risking the problems that come with planting a noxious species, consider these approaches:

  • Choose native plants that are well-documented and appropriate for your region
  • Consult with local extension offices or native plant societies for recommendations
  • If you’re interested in drought-tolerant plants similar to mesquites, look for native alternatives in your area
  • Consider well-behaved, non-invasive plants that provide similar aesthetic or functional benefits

The Bottom Line

While the limited available information about cusqui makes it difficult to provide detailed growing instructions, the plant’s noxious weed classification in the United States is reason enough to avoid it. Gardening responsibly means choosing plants that won’t harm local ecosystems or create problems for you or your neighbors.

When in doubt, stick with well-documented native plants that will thrive in your specific region while supporting local wildlife and maintaining ecological balance. Your garden – and your local environment – will thank you for making thoughtful, informed choices.

What to Do If You Encounter Cusqui

If you suspect you have cusqui growing on your property, contact your local agricultural extension office or weed management authority. They can help with proper identification and provide guidance on safe, legal removal methods if necessary.

Remember, responsible gardening is about more than just creating beautiful spaces – it’s about being a good steward of the environment for future generations.

Cusqui

Classification

Group

Dicot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Magnoliopsida - Dicotyledons

Subclass

Rosidae

Order

Fabales

Family

Fabaceae Lindl. - Pea family

Genus

Prosopis L. - mesquite

Species

Prosopis calingastana Burkart - cusqui

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