annualN. America Native

Narrow-Leaf Zinnia

Zinnia angustifolia

The Story

Plant Bio

Zinnia angustifolia, the narrow-leaf zinnia, is a low-spreading, mat-forming annual native to northern and western Mexico. It produces a dense canopy of narrow, linear-lanceolate leaves topped by single, daisy-like composite flower heads in shades of orange, yellow, and white.

This species is distinguished from Zinnia elegans by its exceptional resistance to powdery mildew and high tolerance to summer heat and humidity. Its clumping, low-profile habit makes it highly effective as a groundcover or trailing container plant.

Uses & Benefits:

Provides a continuous display of bright orange, yellow, or white flowers from summer through fall, forming a dense, low-growing carpet.

Offers high drought tolerance and exceptional resistance to powdery mildew compared to other zinnia species.

Attracts butterflies, honey bees, and other general pollinators, and is frequently visited by hummingbirds in North America.

Essentials

At a Glance

Plant Type

Annual

Height

16"

Width

18"

Light

Full Sun

Zones

4, 5, 6, 7, 8, 9, 10

Water

Low to moderate

Humidity

High tolerance

Lifespan

Annual

Native To

Mexico

Toxicity

Non-toxic

Bloom period

Summer – Fall

In flower about 6 months of the year

Planting

How to Grow

Select a planting site in full sun with exceptionally well-draining soil.
Sow seeds directly into the soil after the last spring frost, covering them lightly with 1/4 inch of soil.
Water gently to keep the soil moist until germination, which typically occurs within 7 to 10 days.
Thin seedlings to 8 to 12 inches apart to ensure adequate air circulation and prevent overcrowding.

Pro Tip

Avoid heavy synthetic nitrogen fertilizers, which stimulate lush foliage at the expense of flower production. Ensure the planting site has excellent drainage, as soggy soils rapidly induce Phytophthora root rot.

Keep It Thriving

Care Guide

Do

Plant in full sun to maximize flower production and prevent fungal issues.
Ensure the soil drains rapidly to protect the root system from rot.
Water at the base of the plant to keep foliage dry.

Don't

Do not over-fertilize with nitrogen, as this suppresses blooming.
Do not allow the soil to remain soggy or waterlogged.
Do not crowd plants, which restricts air circulation and invites disease.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Fertilize
Pest Check
Plant

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Border EdgingGroundcoverMass PlantingContainersRock Gardens

Companion Plants

Salvia farinacea Melampodium divaricatum Pentas lanceolata

Multiply

Propagation Methods

Good to Know

Common Questions

Narrow-Leaf Zinnia questions

What zones can Narrow-Leaf Zinnia grow in?

Narrow-Leaf Zinnia is hardy in USDA Zones 4–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Narrow-Leaf Zinnia bloom?

Narrow-Leaf Zinnia typically blooms in summer through fall. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Narrow-Leaf Zinnia need full sun?

Narrow-Leaf Zinnia does best in full sun (6+ hours).

Is Narrow-Leaf Zinnia drought tolerant?

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