Swamp Azalea (Azalea viscosum) brings late-season fragrance and bright white bloom to moist garden spaces. You get an upright, multi-stemmed deciduous shrub that typically matures about 8-10 feet tall with a broad habit around 6-8 feet wide, making it a strong back-of-border or woodland-edge plant.

Plant it where the soil stays consistently moist and acidic, such as near a pond edge, rain garden margin, or naturally damp area. A layer of leaf mold or pine-bark mulch helps keep roots cool and evenly moist. Avoid hot, dry locations where the root zone bakes in summer.

Light is flexible when moisture is reliable. You can grow it in sun to part shade; in warmer spots, filtered shade is often ideal, while brighter light can increase flowering when the soil never dries out. Water deeply during summer dry spells, especially while establishing.

After flowering, prune only as needed to shape or remove dead wood, and keep the soil undisturbed around the shallow roots. Pair it with other acid-loving natives for a natural look and a seasonal sequence of bloom.

Specifications

• Cold hardiness zone: 4-9 (-30 degrees F) - Contact your local extension to confirm hardiness if you are in a fringe zone (we cannot guarantee hardiness in fringe zones)
• Light: Full sun   Part sun
• Growth rate: Moderate
• Mature height: 96-120"
• Spread: 72-96"
• Fragrant: Yes
• Native to the U.S.: Yes

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