Butterfly bush lives up to its name — fragrant purple, pink, or white panicles attract butterflies in clouds. Choose sterile varieties (Lo & Behold, Flutterby series) to avoid invasive reseeding in ecologically sensitive areas.
Sun: Full sun. Water: Low. Zones: 5–9. Height: 3–10 ft. Bloom time: Mid-summer to fall.
Plant in well-drained soil in full sun. Cut back hard to 12 inches in early spring — blooms on new wood. Deadhead spent panicles to extend flowering. Choose sterile cultivars in regions where Buddleia is invasive.
常见问题
01 Is butterfly bush invasive?
Seeded varieties are invasive in the Pacific Northwest and parts of the East. Plant sterile cultivars like Lo & Behold, Flutterby, or Miss series — they set no viable seed and are sold in ecologically sensitive states. Check your state extension for local guidance.
02 When should I prune butterfly bush?
Early spring — cut back hard to 12 inches. Butterfly bush blooms on new wood, so hard pruning produces bushier plants with more flowers. Don't prune in fall; leave the stems for winter protection in zones 5–6.
03 Why is my butterfly bush not blooming?
Most likely: too much shade or too little pruning. Needs full sun (6+ hours) and aggressive spring pruning. Also: deadhead spent panicles through summer to keep new flowers coming — unpruned plants stop producing new blooms by August.