shrubN. America Native

Bone Hardy Azalea

Rhododendron obtusum 'Bone Hardy Azalea Sampler'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Shrub

Height

36 inches

Width

36 inches

Light

Partial Sun, Shade

Zones

4, 5, 6, 7, 8

Water

Keep soil consistently moist

Humidity

Prefers moderate to high humidity

Lifespan

Long-lived, 20+ years

Native To

Japan

Toxicity

All parts are toxic to humans and pets if ingested.

The Story

Plant Bio

Compact, evergreen or semi-evergreen azalea with striking flowers. Variety known for its cold hardiness and vibrantly colored blooms in early spring.

Bloom Period:

EarlyLate

Uses & Benefits:

Vibrant, early spring blooms add color and fragrance to gardens.

Provides dense foliage for privacy and windbreaks.

Supports pollinators like bees and butterflies during bloom season.

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

Select a well-draining, acidic soil with organic matter for planting.
Tuck roots into a hole twice as wide and just as deep as the root ball.
Water thoroughly after planting to settle soil around roots.
Mist cuttings regularly to maintain humidity and encourage rooting.
Apply mulch around the base to conserve moisture and regulate soil temperature.
Prune lightly after flowering to shape and remove dead or crossing branches.

Pro Tip

Plant in partial shade for vibrant blooms and healthy growth.

Keep It Thriving

Care Guide

Do

Water consistently to keep soil moist but not waterlogged 🌱
Feed with an acid-loving plant fertilizer in spring and summer
Mulch annually to retain moisture and suppress weeds

Don't

Avoid overwatering which can cause root rot ❌
Do not prune in late fall or winter
Refrain from using alkaline fertilizers that raise soil pH

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Shade-loving shrub for woodland gardensColorful border with fragrant bloomsFoundation planting with evergreen backdrop

Companion Plants

Hosta Ferns Azaleas Japanese maple

Multiply

Propagation Methods

Good to Know

Common Questions

Bone Hardy Azalea questions

What zones can Bone Hardy Azalea grow in?

Bone Hardy Azalea is hardy in USDA Zones 4–8. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Bone Hardy Azalea deer resistant?

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

When does Bone Hardy Azalea bloom?

Bone Hardy Azalea typically blooms in mid-spring through late spring. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Bone Hardy Azalea need full sun?

Bone Hardy Azalea does best in part shade.