perennial

New Mexico Giant Hyssop

Agastache pallidiflora

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Essentials

At a Glance

Plant Type

Perennial

Height

24 inches

Width

18 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8, 9

Water

Moderate, drought-tolerant once established

Humidity

Prefers dry to moderate humidity

Lifespan

Perennial

Native To

North America

Toxicity

Non-toxic to humans and pets

The Story

Plant Bio

Agastache pallidiflora is a perennial herbaceous plant with upright, aromatic stems and narrow, lance-shaped leaves. It produces tall spikes of pale lavender to white tubular flowers, attracting pollinators. This species is particularly valued for its drought tolerance and its ability to thrive in well-drained soils, making it a resilient choice for xeriscaping and pollinator gardens.

Uses & Benefits:

Provides vibrant purple blooms and aromatic foliage that attracts pollinators.

Drought-tolerant and low-maintenance, suitable for xeriscaping.

Supports bees and beneficial insects, enriching garden biodiversity.

Marketplace

Where to Buy

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

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Planting

How to Grow

Tuck seeds into well-draining soil in early spring.
Water gently to keep soil moist during germination.
Place in full sun for optimal flowering.
Thin seedlings to improve air circulation after sprouting.
Mulch around plants to retain moisture and suppress weeds.
Divide clumps every 3-4 years in early spring or fall.

Pro Tip

Ensure excellent drainage to prevent root rot and promote healthy growth.

Keep It Thriving

Care Guide

Do

Water regularly during dry spells 🌱
Prune back after flowering to encourage bushiness
Mulch to conserve moisture and suppress weeds
Divide every 3-4 years for vigorous growth

Don't

Overwater, which can cause root rot ❌
Allow soil to become waterlogged
Neglect pruning, which can reduce flowering
Plant in dense shade

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Pollinator-friendly borderFragrant herbaceous bedColorful perennial patch

Companion Plants

Lavender Echinacea Coreopsis Salvia Yarrow

Multiply

Propagation Methods

Good to Know

Common Questions

New Mexico Giant Hyssop questions

What zones can New Mexico Giant Hyssop grow in?

New Mexico Giant Hyssop is hardy in USDA Zones 5–10. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is New Mexico Giant Hyssop deer resistant?

Yes — New Mexico Giant Hyssop is rated deer-resistant. Deer typically pass it over, though extreme hunger can override any plant's defenses.

When does New Mexico Giant Hyssop bloom?

New Mexico Giant Hyssop typically blooms in summer to fall through late summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does New Mexico Giant Hyssop need full sun?

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

Is New Mexico Giant Hyssop drought tolerant?

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