Buddleia × 'Birthday Cake™' is a compact butterfly bush that fills your garden with upright, richly colored flower spikes from summer into fall. You will love its dense purple blooms held above dark green foliage, plus the way it quickly becomes a dependable focal point in beds and borders.

Plant it where it can get plenty of light for best flowering. Full sun is ideal, and part sun also works well, especially in hotter summer areas. Give it well-drained soil and a spot with good air flow. At maturity, expect it to stand about 48-60 inches tall, with a spread around 24-36 inches, making it easy to tuck into smaller landscapes without overwhelming nearby plants.

Water regularly during the first growing season to establish a strong root system. After that, keep moisture consistent during long dry spells and during peak bloom. In late winter or early spring, you can prune to shape and encourage strong new growth for the season ahead. Removing spent flower spikes through summer can help keep it tidy and support continued blooming.

In USDA hardiness zones 5-9, this shrub shines as a pollinator-friendly choice for sunny borders, mixed shrub plantings, and patio containers. The fragrant blooms draw attention from people and visiting wildlife alike, making it an easy way to add long-season color and movement to your outdoor space.

Specifications

• Cold hardiness zone: 5-9 (-20 degrees F) - Contact your local extension to confirm hardiness if you are in a fringe zone (we cannot guarantee hardiness in fringe zones)
• Light: Full sun   Part sun
• Growth rate: Fast
• Mature height: 48-60"
• Spread: 24-36"
• Tolerant of: Deer
• Attracts: Butterflies, Hummingbirds
• Fragrant: Yes

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