perennial

Southern Snapdragon

The Story

Plant Bio

Antirrhinum australe is a small, herbaceous perennial native to the southern Iberian Peninsula and northern Morocco, forming a low, compact mound of lance-shaped to ovate green leaves. The plant produces terminal racemes of tubular, two-lipped flowers in shades of pink, purple, white, and pale yellow throughout spring and summer.

This species is highly adapted to rocky crevices and calcareous soils, exhibiting exceptional drought tolerance once its root system is established. Its compact, mounded growth habit makes it highly suited for rock gardens and dry stone walls where drainage is rapid.

Uses & Benefits:

Produces colorful, tubular flowers on compact, mounded foliage, ideal for rock crevices and container displays.

Thrives in poor, rocky, and alkaline soils where other perennials struggle, requiring very little water once established.

Attracts hummingbirds, native bees, and other beneficial insect pollinators with its nectar-rich blooms.

Essentials

At a Glance

Plant Type

Perennial

Height

12"

Width

Light

Full Sun, Partial Sun

Zones

7, 8, 9, 10

Water

Low

Humidity

Low to Moderate

Lifespan

Perennial

Native To

Southern Spain and Northern Morocco

Toxicity

Non-toxic

Bloom period

Spring – Summer

In flower about 6 months of the year

Planting

How to Grow

Select a planting site that receives at least six hours of direct sunlight daily.
Amend heavy soils with sand, gravel, or limestone to ensure rapid drainage and an alkaline to neutral pH.
Space plants six to eight inches apart to accommodate their compact, mounded mature spread.
Water sparingly after planting, allowing the soil to dry out completely between waterings to prevent root rot.

Pro Tip

Plant in highly porous, alkaline or neutral soil and avoid overwatering; excess moisture in heavy or organic soils rapidly triggers fatal root rot.

Keep It Thriving

Care Guide

Do

Deadhead spent flower spikes regularly to encourage continuous blooming through summer.
Provide a low-rate, balanced fertilizer once a month during the active spring and summer growing seasons.
Grow in raised beds or rocky crevices to guarantee the high drainage this species requires.

Don't

Do not overwater or allow the soil to become waterlogged, as wet roots quickly rot.
Do not cut back into old, leafless woody stems when pruning, as this limits regrowth.
Do not plant in highly organic, heavy clay soils that retain moisture.

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Fertilize
Propagate
Prune

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Rock GardensDry Stone WallsContainer PlantingBorder Edging

Companion Plants

Lavandula angustifolia Rosmarinus officinalis Thymus vulgaris

Multiply

Propagation Methods

Good to Know

Common Questions

Southern Snapdragon questions

What zones can Southern Snapdragon grow in?

Southern Snapdragon is hardy in USDA Zones 7–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

When does Southern Snapdragon bloom?

Southern Snapdragon typically blooms in spring through summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Southern Snapdragon need full sun?

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

Is Southern Snapdragon drought tolerant?

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