perennial

Mexican Giant Hyssop

Agastache mexicana 'Toronjil Morado'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Perennial

Height

30 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

7, 8, 9

Water

Low to moderate

Humidity

Average

Lifespan

Perennial

Native To

Mexico

Toxicity

Non-toxic

The Story

Plant Bio

Agastache mexicana, commonly known as Mexican giant hyssop, is a perennial herb with aromatic, lance-shaped leaves and spikes of tubular, violet-purple flowers that attract pollinators. The foliage has a strong lemon-mint scent. The vibrant rosy-purple flowers are borne in dense whorls on tall spikes, attracting bees, butterflies, and especially hummingbirds.

Bloom Period:

EarlyLate

Uses & Benefits:

Adds vibrant purple color and fragrant flowers to borders, attracting pollinators and enhancing garden scent.

Drought-tolerant and low-maintenance, ideal for water-wise gardens and xeriscaping.

Supports local pollinators like bees and butterflies, promoting biodiversity.

Marketplace

Where to Buy

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Planting

How to Grow

Tuck seeds into well-draining soil in early spring
Water regularly until established, then reduce watering
Place in full sun for optimal flowering
Fertilize lightly in spring with balanced fertilizer
Divide in early spring or fall every 2-3 years
Prune after flowering to promote bushiness

Pro Tip

Ensure well-draining soil and full sun for best growth

Keep It Thriving

Care Guide

Do

Water during dry spells 🌱
Prune after flowering to maintain shape
Mulch to conserve moisture

Don't

Overwater to prevent root rot ❌
Use heavy clay soil without amendments ❌
Neglect pruning after bloom ❌

Seasonal Care Calendar

Task	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Deadhead
Spring Cleanup

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Fragrant border with purple flowersDrought-tolerant herbaceous perennialPollinator-friendly garden feature

Companion Plants

Salvia Lavender Echinacea Yarrow Coreopsis

Multiply

Propagation Methods

Good to Know

Common Questions

Mexican Giant Hyssop questions

What zones can Mexican Giant Hyssop grow in?

Mexican Giant Hyssop 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 Mexican Giant Hyssop deer resistant?

Not reliably. Deer may browse Mexican Giant Hyssop, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Mexican Giant Hyssop bloom?

Mexican Giant Hyssop 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 Mexican Giant Hyssop need full sun?

Mexican Giant Hyssop does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Mexican Giant Hyssop drought tolerant?

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