Light Needs
Mature Height
Mature Spread
Growing Zones
The Stewartstonian Azalea is a broadleaf evergreen shrub that provides year-round visual interest and thrives all the way up in zone 5. Bright, red-orange trumpet-shaped flowers bloom in the spring. Glossy, deep-green foliage provides a nice contrast against the flowers. By fall, the leaves turn a reddish-chocolate hue. Old leaves drop during the winter but will be replaced by mahogany-colored foliage in the spring. This is a slow-growing plant that will be covered in flowers during the spring.
Feature this Azalea in an area where the lovely springtime blooms will be on full display. This stunner is good to feature in a bed, border, or mass planting. At 5 to 6 feet tall and with an upright growth habit, this shrub can make a beautiful hedge or privacy screen. The bold red flowers are a draw for hummingbirds and butterflies. The Stewartstonian Azalea grows as a perennial in USDA zones 5 through 8.
Stewartstonian Azalea Care
The Stewartstonian Azalea is a medium-care plant. Select a good site and mind the soil for best results, but know that this plant does need some help to thrive. Plant this shrub in full sun to partial shade. The Stewartstonian Azalea can take on the full sun in northern areas but will require more shade in southern regions. The soil quality is important for this Azalea cultivar. Use rich, acidic soil that is moist but still allows drainage. Water about one inch per week, taking care to ensure the soil does not dry out. Apply a layer of mulch around the base of the plant to help hold in the moisture.
Applying organic mulch can help feed the plant and support healthy growth or use a balanced fertilizer in the spring. More advanced gardeners may want to test the soil and apply an acidic fertilizer if the soil pH is too high. Remove dead growth as needed and shape the shrub after the blooms fade away.
Stewartstonian Azalea Spacing
This shrub is an upright, spreading Azalea with woody stems. The Stewartstonian Azalea will grow 5 to 6 feet tall and 4 to 5 feet wide. Plants can be grown 2 to 3 feet apart to create a hedge or allow more space so that this beauty will be a focal point.
Stewartstonian Azalea Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 5 to 8 (perennial); grown as an annual elsewhere (outdoors year-round); grown indoors elsewhere (outdoors year-round); grown in containers elsewhere (grown as a seasonal crop)
- Sun Exposure
- Part Sun to Full Sun (5+ Hours Direct Sun)
- Mature Height
- 5-6 Feet
- Mature Spread
- 4-5 Feet
- Growth Rate
- Moderate
- Growth Habit
- , Mounded, Upright, Spreading
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , Red
- Flower Description
- Blood Red
- Bloom Time
- Mid-Spring
- Blooms On
-
Old Wood
?
"Blooms on" tells you which stems produce flowers, which decides when it's safe to prune.
- New Wood: Flowers form on stems that grow this season. Prune in late winter or early spring without losing blooms.
- Old Wood: Flower buds form on last year's stems. Prune right after flowering. Pruning in fall or early spring removes next year's blooms.
- Both New and Old Wood: Blooms on last year's stems and again on new growth, so it flowers even after a hard winter or a mistimed pruning. Prune lightly after the first flush of blooms.
- When to Prune
- Right after flowering
- Foliage Color
- , Green, Red
- Foliage Description
- Dark Green
- Foliage Type
- , Evergreen, Semi-Evergreen
- Seasonal Interest
- , Spring Flowering, Summer Flowering, Fall Flowering, Winter Interest, 4 Season Interest
Garden Benefits
Plant Overview
- Common Name
- Stewartstonian Azalea
- Botanical Name
- AZALEA 'STEWARTSTONIAN'
- Plant Type
- Shrub
Simple Plant Spacing Calculator
Please Note: The pictures below are to give a general representation of the different container sizes. The actual size/ages of plants are estimates and will vary based on type of plant, time of year, last pruning & many other factors.
Also Known As:
Quart
Plant Age:
~ 6 months - 1 year
Plant Size:
~ 4"-8"
Pot Size:
~ 4.75"H x 4.5"W
Volume:
1.50 quarts
Also Known As:
2.5 Quart Pot
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 8"-12"
Pot Size:
~ 6.5"H x 6.5"W
Volume:
2.20-2.30 quarts
Also Known As:
#1 Container
1 Gallon
Plant Age:
~ 1 - 2 years old
Plant Size:
~ 10"-14"
Pot Size:
~ 7"H x 7.75"W
Volume:
2.26-3.73 quarts
Also Known As:
#2 Container
2 Gallon
Plant Age:
~ 1.5 - 3 years old
Plant Size:
~ 12"-18"
Pot Size:
~ 9.5"H x 9.5"W
Volume:
1.19-1.76 gallons
Also Known As:
#3 Container
3 Gallon
Plant Age:
~ 2 - 4 years old
Plant Size:
~ 12"-30"
Pot Size:
~9.5"H x 11"W
Volume:
2.32-2.76 gallons
Also Known As:
#5 Container
5 Gallon
Plant Age:
~3-4 years old
Plant Size:
~ 20" - 60"
Pot Size:
~11" H x 10 1/2” W
Volume:
3.5 - 4 gallons
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Plant Addicts ships to the lower 48 states within the U.S. Unfortunately, we do not currently ship to Alaska, Hawaii, or internationally.
This plant cannot be shipped to the following states: AK, HI. These restrictions apply only to this specific plant due to agricultural regulations or other limitations. Other plants may still be available for shipping to these states.
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