shrub

Admiral Semmes Deciduous Azalea

Rhododendron 'Admiral Semmes'

Not currently listed at our partner nurseries.

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Essentials

At a Glance

Plant Type

Shrub

Height

84 inches

Width

60 inches

Light

Full Sun, Partial Sun

Zones

5, 6, 7, 8, 9

Water

Medium

Humidity

High tolerance

Lifespan

Long-lived shrub

Native To

Hybrid

Toxicity

All parts are toxic if ingested.

The Story

Plant Bio

'Admiral Semmes' is a vigorous, deciduous hybrid azalea from the Aromi series, bred for heat and humidity tolerance in the southern US. It has an upright, spreading habit and mildew-resistant foliage. This cultivar is celebrated for its large, fragrant, golden-yellow flowers that attract hummingbirds. Its superior heat tolerance makes it a superb choice for warmer climates where other azaleas struggle.

Bloom Period:

EarlyLate

Uses & Benefits:

Offers a stunning late spring display of large, fragrant, golden-yellow flowers. Its upright habit makes it an excellent background plant or standalone specimen, with clean, mildew-resistant foliage all summer.

Specifically bred for heat and humidity tolerance, it thrives in the challenging climate of the southeastern US, extending the range for growing beautiful deciduous azaleas.

The large, tubular flowers are a significant nectar source for pollinators, and are particularly attractive to hummingbirds and large butterflies like swallowtails.

Marketplace

Where to Buy

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Planting

How to Grow

Select a site with at least 6 hours of sun and acidic soil.
Amend the planting area with organic matter like compost.
Dig a hole as deep as the root ball and twice as wide.
Place the plant so the top of the root ball is slightly elevated.
Backfill the hole, water thoroughly, and mulch well.
Water regularly during the first year to establish a deep root system.

Pro Tip

Plant in a location with good air circulation to further enhance its natural resistance to powdery mildew.

Keep It Thriving

Care Guide

Do

Provide consistent moisture, especially in the first few years.
Mulch to conserve water and keep roots cool.
Prune after flowering to maintain a desirable shape.
Give it space to grow to its full, impressive size.

Don't

Do not plant in heavy, wet soil.
Avoid deep cultivation around the shallow roots.
Do not let it dry out in extreme heat, especially when young.
Avoid alkaline soil amendments like lime.

Seasonal Care Calendar

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

Watch Out For

Pests & Diseases

Common Pests

Common Diseases

In the Garden

Landscape Uses & Companions

Landscape Uses

Fragrant specimen shrubSunny mixed border accentWoodland edge planting

Companion Plants

Ilex verticillata Hydrangea quercifolia Rudbeckia fulgida Echinacea purpurea Panicum virgatum

Multiply

Propagation Methods

Good to Know

Common Questions

Admiral Semmes Deciduous Azalea questions

What zones can Admiral Semmes Deciduous Azalea grow in?

Admiral Semmes Deciduous Azalea is hardy in USDA Zones 5–9. Inside that range it survives winter in the ground; outside it, grow it as an annual or a container plant you protect.

Is Admiral Semmes Deciduous Azalea deer resistant?

Not reliably. Deer may browse Admiral Semmes Deciduous Azalea, especially tender spring growth — plan on repellents or fencing where pressure is high.

When does Admiral Semmes Deciduous Azalea bloom?

Admiral Semmes Deciduous Azalea typically blooms in late spring through early summer. Exact timing shifts a week or two with your zone — Sow's bloom calendar maps it to your garden.

Does Admiral Semmes Deciduous Azalea need full sun?

Admiral Semmes Deciduous Azalea does best in full sun to part shade. In hot climates, afternoon shade keeps blooms fresher longer.

Is Admiral Semmes Deciduous Azalea drought tolerant?

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