Light Needs
Mature Height
Mature Spread
Growing Zones
The Bicolor Butterfly Bush features two-tone flowers that transition from light pink to purple throughout the bloom cycle. Tiny trumpet-shaped flowers have an orange eye and bloom in cone-shaped clusters. The pastel blooms are pink and fade to purple, giving an ombre appearance. What’s more, the flowers of the Buddleia x weyeriana 'Bicolor' bloom in ascending order, so a single flower cluster will have buds and open flowers that are in various stages of changing color at any given time. Enjoy the showy flowers from mid-summer to fall. Ovate green foliage has finely serrated edges and adds interest even when the plant is out of bloom.
The Bicolor Butterfly Bush is a natural choice for a butterfly garden. The stunning flowers attract and support pollinators like butterflies and bees. This beauty is also suitable for mixed beds, borders, and containers. Trim the stems to include the lovely flowers in arrangements. The Bicolor Butterfly Bush grows in zones 5 through 9.
Bicolor Butterfly Bush Care
Select a planting location in full sun to part shade; it will bloom best in full sun. The Bicolor Butterfly Bush needs about 4 to 6 hours of direct sunlight. Give the plant a rich, moist, well-drained soil. Water deeply a few times a week to encourage a robust root system. Keep the soil moist, but avoid soggy conditions. Spread a layer of organic compost to retain moisture, eliminate weeds, and support growth.
Prune the Bicolor Butterfly Bush in spring to encourage a full, bushy form. Remove faded flowers or deadhead throughout the summer to extend the bloom cycle.
Bicolor Butterfly Bush Spacing
Bicolor Butterfly Bush plants stand 4 to 6 feet tall and 3 to 5 feet wide. Create a dense planting by spacing shrubs 3 to 5 feet apart center on center.
Bicolor Butterfly Bush Plant Facts
Growing Conditions
- Hardiness ZonesGrowing Zones
- USDA Zones 5 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 Shade to Full Sun (3+ Hours Direct Sun)
- Mature Height
- 5-6 Feet
- Mature Spread
- 4-5 Feet
- Growth Rate
- Fast
- Growth Habit
- , Clumping, Upright
- Water Needs
- Dry
Flowers & Foliage
- Flower Colors
- , Purple, Yellow, Blue, Pink, White
- Flower Description
- Mix of Blue, Purple, and White
- Bloom Time
- Mid-Summer to Frost
- Blooms On
-
New 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
- Late winter to early spring, before new growth starts
- Foliage Color
- , Green, Silver
- Foliage Description
- Green
- Foliage Type
- , Deciduous
- Seasonal Interest
- , Summer Flowering, Fall Flowering, Fall Interest, 3 Season Interest
Garden Benefits
Plant Overview
- Common Name
- Bicolor Butterfly Bush
- Also Known As
- Summer Lilac
- Botanical Name
- Buddleia x weyeriana 'Bicolor'
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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We want your plants to arrive in great condition! If you notice any issues upon delivery, contact us within 3 days.
Starting January 1, 2026 all bushes, perennials & trees purchased come with an extended 1-year warranty for added confidence. If your plant dies due to a health issue within a year, we’ll make it right.
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: ID, OR, 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!