2 named cultivars

grass

Elephant Grass

The Story

Plant Bio

Pennisetum purpureum, elephant grass or napier grass, is a warm-season perennial grass from Africa, forming upright clumps four to six feet high and three to five across in a single season. The broad arching blades are green or, in the widely grown selections, deep burgundy-purple. Yellow-brown flower spikes appear in October where the season is long enough.

It sets seed and spreads invasively in warm-winter regions, and is a listed problem plant in parts of the southeastern United States and Hawaii. North of zone 8 it is grown as an annual and killed by frost long before it flowers, which is the simplest safeguard; further south, choose a sterile ornamental selection.

Uses & Benefits:

Fast, tall, boldly coloured foliage that gives a border height and movement within one season.

Makes a temporary screen in a single summer, and grows well in a large container.

Grown as a frost-killed annual it carries no seed risk; in warm regions it can displace native vegetation.

Essentials

At a Glance

Plant Type

Grass

Height

60 inches

Width

36 inches

Light

Full Sun, Partial Sun

Zones

9, 10

Water

Medium

Humidity

Average

Lifespan

Perennial, often grown as an annual

Native To

Africa

Toxicity

Non-toxic

Planting

How to Grow

Plant out after the last frost in full sun.
Choose average, well-drained soil.
Allow at least four feet of space per plant.
Water regularly through the first weeks.
Feed once in early summer to drive growth.
Cut to the ground in autumn, or lift in cold regions.

Pro Tip

Grown as an annual it makes its full height in one season, so plant small and cheap rather than paying for a large specimen.

Keep It Thriving

Care Guide

Do

Give it full sun and plenty of room ☀️
Grow it as an annual north of zone 8 🍂
Water it well through establishment 💧
Choose a sterile selection in warm regions 🌾

Don't

Let it flower and seed in a warm-winter climate ❌
Crowd it against smaller plants ❌
Plant it near wetlands or natural areas ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Cut Back
Plant

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Bold seasonal screen or backdropSpecimen grass in a large containerMassed planting for texture and colour contrast

Companion Plants

Canna Dahlia SalviaSweet Potato Vine Verbena Bonariensis

Multiply

Propagation Methods

Good to Know

Common Questions

Elephant Grass questions

What zones can Elephant Grass grow in?

Elephant Grass is hardy in USDA Zones 9–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Elephant Grass deer resistant?

Yes — Elephant Grass is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does Elephant Grass bloom?

Elephant Grass typically blooms in mid-fall where the season is long enough through late fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Elephant Grass need full sun?

Elephant Grass does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Elephant Grass drought tolerant?

Yes — once established (usually after the first full season), Elephant Grass handles dry spells with minimal watering. Water deeply its first year to build the root system that makes that possible.