Light Needs
Mature Height
Mature Spread
Growing Zones
The Bloom-A-Thon White Azalea from Proven Winners ColorChoice is a reblooming shrub that sets it apart from other typical azaleas. The plant blooms in the spring around April for 4 to 6 weeks. Then blooms again in the summer and fall for another 12 to 16 weeks until the first frost. The foliage is semi-evergreen, which means the leaves on the outer edge of the branches stay green year round, but the leaves located in the inner part of the shrub drop in the winter.
This shrub is not only beautiful for more of the year, it is also disease and heat resistant. Even the hottest summer days do not prevent this beautiful plant from producing large white flowers.
Use these small shrubs in mass plantings for a terrific show for over 20 weeks. We also like planting these bushes in garden planters due to their year-round color of green foliage and white flowers. We’ve also seen these planted as short border hedges, which are great around landscaping or garden paths.
Bloom-A-Thon White Azalea Care
Plant these shrubs in an area that receives at least 4-6 hours of sunlight a day. However, these plants can handle full sunlight even on the hottest southern summer days. If you live in zone 7, avoid late season plantings because the azaleas need time to prepare for winter.
Apply a layer of mulch 2-3 inches deep around the base of the plant to help retain moisture and protect the shallow roots from harsh weather conditions. Do not fertilize these plants after mid-July.
Pruning Bloom-A-Thon White Azaleas should be done each year after the spring bloom has started to fade. This will encourage the plant to produce new growth, which will include another round of blooms that will last late into fall.
Bloom-A-Thon White Azalea Spacing
Plant these shrubs at least 3 feet apart, center on center. If you are creating a short garden path border you can plant 30 inches apart, center on center, for a flowering evergreen hedge.
Compare Bloom-A-Thon® Azaleas
Compare flower color, mature size, landscape role, and the features that set each Bloom-A-Thon® Azalea apart.
| Variety | Flowers | Mature Size | Best For | Why Choose It |
|---|---|---|---|---|
| Pure white | 2.5–3' H × 2.5–3' W | Small spaces / containers | Most compact selection with bright white flowers | |
| Clear red | 3–4' H × 3–4' W | Accent / low hedge | Strong warm color on a balanced mounded shrub | |
| Double pink | 3.5–4.5' H × 3–4' W | Foundation / mass planting | Layered double blooms create the fullest flower look | |
| Lavender-purple | 3.5–4.5' H × 3–4' W | Cool-toned specimen | Uncommon lavender color for a reblooming azalea | |
| Saturated hot pink | 3.5–4.5' H × 3.5–4.5' W | Mass planting / focal color | Strongest pink color with a broad, full mound |
Bloom-A-Thon® White Azalea Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 7 to 9 (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
- 2.5-3 Feet
- Mature Spread
- 2.5-3 Feet
- Growth Habit
- , Mounded
- Water Needs
- Average
Flowers & Foliage
- Flower Colors
- , White
- Flower Description
- White
- Bloom Time
- Spring to Fall
- Blooms On
-
Both New and 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
- Lightly, right after the first flush of flowers
- Foliage Color
- , Green
- Foliage Description
- Green
- Foliage Type
- , Semi-Evergreen
- Seasonal Interest
- , Spring Flowering, Summer Flowering, Fall Flowering, Winter Interest, 3 Season Interest, 4 Season Interest
Garden Benefits
Plant Overview
- Common Name
- Bloom-A-Thon® White Rhododendron x 'RLH1-3P3'
- Botanical Name
- Rhododendron x USPP 11,311
- Brand
- Proven Winners
- Plant Type
- Semi Evergreen
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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