Light Needs
Mature Height
Mature Spread
Growing Zones
Lo and Behold 'Purple Haze' Butterfly Bush loads all of the benefits of a butterfly bush into a smaller package, plus it's sterile. Since Lo and Behold does not set seed, it can't become invasive, a problem in some areas of the country with older butterfly bush (Buddleia) varieties. Now that we have that out of the way, think about this butterfly magnet as the prettiest ground cover you could have in zones 5 through 9. It will bloom all summer and into fall, attracting birds, butterflies and hummingbirds to your garden.
Lo and Behold 'Purple Haze' grows shorter and wider than most upright butterfly bushes, so it also can form a low border in the landscape, with several planted near one another. Its fragrant, purple-blue flowers form in summer in long-cone-shaped bursts of color. Yet another bonus? Butterfly bushes need no deadheading; the flowers keep forming all season. And once the shrub is established, it can handle drought and keep on flowering.
Lo and Behold Purple Haze Butterfly Bush Care
Plant your Lo and Behold 'Purple Haze' Butterfly Bush in full sun and soil that drains well. Each spring, prune the branches down to where you see new leaves forming, fairly close to the ground. Water it a little more in the first year. That's all you have to do to keep your butterfly bush healthy and bringing in monarchs and other butterflies.
Lo and Behold Purple Haze Butterfly Bush Spacing
For a garden or landscape border, plant your Lo and Behold 'Purple Haze' shrubs 3 to 3.5 feet apart from one center to another.
Interesting Facts - This plant is sometimes called "summer lilac" instead of a "butterfly bush."
Compare Lo & Behold® Butterfly Bushes
Compare flower color, growth habit, mature size, and the features that set each Lo & Behold® butterfly bush apart.
| Variety | Flowers | Habit | Mature Size | Why Choose It |
|---|---|---|---|---|
| Ruby-magenta | Compact, mounded | 30–32" H × 30–32" W | Richest warm ruby-magenta color in the series | |
| Blue-purple | Compact, mounded | 2–2.5' H × 2–2.5' W | The original Lo & Behold® selection | |
| Blue-purple | Compact, mounded | 1.5–2.5' H × 1.5–2.5' W | Earlier blooming with bluer flowers than Blue Chip | |
| Lavender-purple | Low, mounded | 1.5–2' H × 2–2.5' W | Soft lilac color on a low-growing shrub | |
| Purple-blue | Low, spreading | 2–3' H × 3–3.5' W | Widest spreading habit for slopes & broad plantings | |
| White | Low, spreading | 1.5–2' H × 2–2.5' W | Only white-flowered choice; useful for low groundcover effects | |
| Orchid pink | Compact, mounded | 1.5–2' H × 1.5–2' W | Smallest footprint with orchid-pink flowers |
Lo and Behold® Purple Haze 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
- Full Sun (6+ Hours Direct Sun)
- Mature Height
- 2-3 Feet
- Mature Spread
- 3-3.5 Feet
- Growth Habit
- , Spreading
- Water Needs
- Dry
Flowers & Foliage
- Flower Colors
- , Purple
- Flower Description
- Purple
- Bloom Time
- Summer to Fall
- 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
- Foliage Description
- Green
- Foliage Type
- , Deciduous
- Seasonal Interest
- , Summer Flowering, Fall Flowering, 3 Season Interest
Garden Benefits
Plant Overview
- Common Name
- Lo and Behold® Purple Haze Butterfly Bush
- Also Known As
- Summer Lilac
- Botanical Name
- Buddleia x USPP 24,514
- Brand
- Proven Winners
- Plant Type
- Non-invasive
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: 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!