Pelargonium x hortorum 'Australian Mystery'

annual RHS Award

Australian Mystery Geranium

Pelargonium x hortorum 'Australian Mystery'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Annual

Height

18 inches

Width

15 inches

Light

Full Sun, Partial Sun

Water

Medium

Humidity

Average

Lifespan

Tender perennial, grown as an annual

Native To

South Africa (species parentage)

Toxicity

Toxic to dogs, cats, and horses

The Story

Plant Bio

Zonal geraniums are tender perennials, typically grown as annuals. They are upright, bushy plants prized for their long-lasting, colorful flower clusters and rounded leaves, which often feature a distinct dark, horseshoe-shaped zone. Features showy clusters of single, bicolored flowers with soft pink petals splashed and speckled with a vibrant cerise-pink, creating a unique, artistic effect. The foliage is medium green.

Uses & Benefits:

Bright and colorful flowers make it perfect for containers and borders, adding vibrancy to gardens.

Drought-tolerant and low-maintenance, suitable for busy gardeners seeking easy-care plants.

Provides nectar for pollinators like bees and butterflies, supporting local ecosystems.

Marketplace

Where to Buy

We couldn't find this plant listed online right now.

Shipping costs Year-round shipping Free shipping

Planting

How to Grow

Tuck seeds into well-draining soil and water gently to settle.
Provide at least 6 hours of direct sunlight daily for optimal growth.
Mist cuttings regularly to maintain humidity and promote rooting.
Fertilize monthly with a balanced liquid fertilizer during the growing season.
Prune leggy growth to encourage bushier form and remove dead leaves.
Transplant seedlings carefully into larger containers when roots outgrow.

Pro Tip

Use well-draining soil and avoid overwatering to prevent root rot.

Keep It Thriving

Care Guide

Do

Water when the top inch of soil feels dry 🌱
Prune regularly to maintain shape and remove dead foliage
Fertilize monthly during active growth
Provide ample sunlight for healthy flowering

Don't

Avoid overwatering to prevent root rot ❌
Do not expose to frost or freezing temperatures
Skip fertilizing in winter when plant is dormant
Do not ignore pests or diseases early

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Fertilize
Lift Store
Pinch
Plant
Propagate

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Colorful container displayVivid border plantDrought-tolerant garden accent

Companion Plants

Petunia Verbena Lantana Salvia Marigold

Multiply

Propagation Methods

Good to Know

Common Questions

Australian Mystery Geranium questions

What zones can Australian Mystery Geranium grow in?

Australian Mystery Geranium is hardy in USDA Zone 10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Australian Mystery Geranium deer resistant?

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

When does Australian Mystery Geranium bloom?

Australian Mystery Geranium typically blooms in late spring, summer, fall through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Australian Mystery Geranium need full sun?

Australian Mystery Geranium does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Australian Mystery Geranium drought tolerant?

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