Alstroemeria x hybrida 'The Third Harmonic'

Garden hybrid

This is a garden hybrid, bred from more than one wild species, so it has no single species page of its own.

12 other cultivars

perennial

The Third Harmonic Alstroemeria

Alstroemeria x hybrida 'The Third Harmonic'

The Story

Plant Bio

Vibrant orange flowers that are attractive for cutting

Known for its unique color and vigorous growth

Uses & Benefits:

Bright, showy flowers add vibrant color to gardens and bouquets.

Attracts pollinators like bees and butterflies, supporting local ecology.

Provides habitat and nectar for beneficial insects.

Garden hybrid

Bred from more than one wild species, so it has no species page of its own.

Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

7, 8, 9, 10

Water

Moderate

Humidity

Moderate

Lifespan

Perennial in suitable zones

Native To

South America

Toxicity

Sap may cause skin irritation; mildly toxic if ingested

Bloom period

Mid-summer – Late summer

In flower about 2 months of the year

Planting

How to Grow

Tuck seeds or divisions into well-draining soil in early spring.
Mist cuttings regularly to maintain humidity and promote rooting.
Water deeply once a week during active growth, especially in dry periods.
Fertilize with a balanced liquid feed every 4-6 weeks during growing season.
Prune spent flower stems to encourage new blooms, after flowering.
Mulch around the base to retain moisture and suppress weeds.

Pro Tip

Plant in a sheltered spot with partial shade for best flowering performance.

Keep It Thriving

Care Guide

Do

Water consistently to keep soil moist but not waterlogged 🌱
Feed with a high-potassium fertilizer during flowering
Prune dead or damaged stems regularly
Mulch to conserve moisture and regulate soil temperature

Don't

Avoid overwatering, which can cause root rot ❌
Don’t expose to harsh afternoon sun in hot climates
Refrain from disturbing roots during the flowering season
Don’t forget to remove spent flowers promptly

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Fertilize
Harvest
Mulch

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Vivid perennial border with colorful bloomsElegant container plant for patiosFragrant cut flower in floral arrangements

Companion Plants

Lavender Salvia Coreopsis Echinacea Gaillardia

Multiply

Propagation Methods

Good to Know

Common Questions

The Third Harmonic Alstroemeria questions

What zones can The Third Harmonic Alstroemeria grow in?

The Third Harmonic Alstroemeria 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.

Is The Third Harmonic Alstroemeria deer resistant?

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

When does The Third Harmonic Alstroemeria bloom?

The Third Harmonic Alstroemeria typically blooms in mid-summer through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does The Third Harmonic Alstroemeria need full sun?

The Third Harmonic Alstroemeria does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.