Light Needs
Mature Height
Mature Spread
Growing Zones
The Johanna Azalea is a low-maintenance beauty that provides multi-season color to brighten a garden or landscape. Large buds open to reveal single blooms with ruffled petals in a deep, rich red during the late spring and summer. Also known as Azalea kaempferi, this tall, mounded plant has woody stems. The rich green leaves turn a bronzy purple hue for continued color and interest during the winter.
Azaleas are perennials that look lovely in beds, borders, or mass plantings. The Johanna Azalea will reach 5 to 6 feet tall, making this semi-evergreen cultivar a wonderful option for a hedge or foundation planting. Feature this plant in a container for easy movement throughout your space. Pollinators, like hummingbirds and butterflies, are drawn to the flowers of this shrub which grows as a perennial in USDA zones 6 through 8.
Johanna Azalea Care
An area with dabbled light is ideal for the shade-loving Johanna Azalea. This plant can handle some direct sunlight but select a spot that receives no more than 2 to 4 hours of direct light per day. Plant in rich soil with a 4.5 to 5.5 pH. The soil should be moist but allow for good drainage. Give the plant about one inch of water per week and apply a layer of mulch to keep the soil damp longer. Established plants can be drought-tolerant, but new plants will need routine watering.
Apply a balanced plant food in the spring or test the soil and use an acidic fertilizer if the soil pH is too high. Remove dead growth at any time and shape the plant in the summer after the bloom cycle completes.
Johanna Azalea Spacing
This plant is an upright perennial that can grow relatively tall and wide. Mature plants will reach 5 to 6 feet tall and wide. Create a hedge or mass planting by spacing plants 4 to 6 feet apart.
Johanna Azalea Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 6 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
- 5-6 Feet
- Growth Rate
- Moderate
- Growth Habit
- , Upright, Mounded
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , Red
- Flower Description
- Crimson 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
- Foliage Description
- Green
- Foliage Type
- , Semi-Evergreen
- Seasonal Interest
- , Spring Flowering, 4 Season Interest, Winter Interest
Garden Benefits
Plant Overview
- Common Name
- Johanna Azalea
- Botanical Name
- AZALEA KAEMPFERI 'JOHANNA'
- 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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Plants that are currently in stock typically ship within 2-7 business days after your order is placed.
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.
If you have any questions about shipping restrictions, feel free to reach out to our team!