North America Non-native Plant

Diploperennial Teosinte

Botanical name: Zea diploperennis

USDA symbol: ZEDI

Habit: grass

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

Diploperennial Teosinte: A Rare Grass with an Important Story Meet diploperennial teosinte (Zea diploperennis), a fascinating grass that’s much more than meets the eye. This remarkable plant isn’t just another ornamental grass – it’s a living piece of agricultural history and one of the rarest plants you could possibly grow ...

Diploperennial Teosinte: A Rare Grass with an Important Story

Meet diploperennial teosinte (Zea diploperennis), a fascinating grass that’s much more than meets the eye. This remarkable plant isn’t just another ornamental grass – it’s a living piece of agricultural history and one of the rarest plants you could possibly grow in your garden.

What Makes Diploperennial Teosinte Special?

Diploperennial teosinte is a wild relative of corn, and it’s absolutely critical for understanding our food system. This tall, corn-like grass grows in dramatic clumps and can reach impressive heights, making it quite the architectural statement in the right setting. But here’s the catch – it’s incredibly rare in the wild, found only in a tiny area of Mexico’s Sierra de Manantlán.

Where Does It Come From?

This unique grass is endemic to a small region in Jalisco, Mexico, where it grows naturally in mountainous areas. Unfortunately, its native habitat is extremely limited, making it one of the most geographically restricted grasses in the world.

A Word of Caution: Rarity Matters

Before you get too excited about growing diploperennial teosinte, there’s something important you need to know. This plant is critically rare – we’re talking about a species that’s hanging on by a thread in the wild. If you’re considering growing it, you absolutely must source it responsibly from reputable botanical institutions or conservation programs. Never collect from wild populations, as this could contribute to its extinction.

Should You Grow Diploperennial Teosinte?

This isn’t a plant for every gardener, but it might be perfect if you’re interested in:

  • Conservation gardening and preserving rare species
  • Educational landscapes that tell the story of crop evolution
  • Botanical collections focused on economically important plants
  • Supporting genetic diversity in our food system

Keep in mind that this grass doesn’t offer much for pollinators since it’s wind-pollinated, and it’s not going to give you showy flowers. Its value lies in its conservation importance and educational potential.

Growing Conditions and Care

If you live in USDA hardiness zones 9-11 and can source this plant responsibly, here’s what diploperennial teosinte needs to thrive:

  • Climate: Warm temperatures year-round with protection from frost
  • Sunlight: Full sun for best growth
  • Soil: Well-draining soil that doesn’t stay waterlogged
  • Water: Regular moisture during the growing season, but not soggy conditions
  • Space: Give it room to form substantial clumps

Planting and Care Tips

Growing diploperennial teosinte successfully requires attention to its specific needs:

  • Plant in spring after all danger of frost has passed
  • Provide consistent moisture during active growth periods
  • Protect from cold temperatures – this plant won’t survive freezing weather
  • Allow plenty of space for the grass to develop its natural form
  • Consider growing in containers in colder climates so you can bring it indoors

The Bottom Line

Diploperennial teosinte isn’t your typical garden grass, and that’s exactly the point. If you’re passionate about conservation, interested in the story of agriculture, or want to contribute to preserving genetic diversity, this rare grass could be a meaningful addition to your landscape. Just remember – with great rarity comes great responsibility. Only grow it if you can source it ethically and provide the care it needs to thrive.

For most gardeners looking for attractive grass alternatives, consider exploring other native grass options that are more readily available and better suited to typical garden conditions. But if you’re up for the challenge and committed to conservation, diploperennial teosinte offers a unique opportunity to be part of preserving one of our planet’s most important plant relatives.

Diploperennial Teosinte

Classification

Group

Monocot

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision

Spermatophyta - Seed plants

Division

Magnoliophyta - Flowering plants

Subdivision
Class

Liliopsida - Monocotyledons

Subclass

Commelinidae

Order

Cyperales

Family

Poaceae Barnhart - Grass family

Genus

Zea L. - corn

Species

Zea diploperennis Iltis, Doebley & Guzman [excluded] - diploperennial teosinte

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