Butterfly bushes generally bloom from summer through fall , with flowers typically starting to appear in July and continuing until the first frost. The blooming period can last continuously for several weeks, depending on the variety and growing conditions. Butterfly bushes bloom on new wood, so pruning in late winter or early spring encourages flowering on the new growth. The blooms attract pollinators like butterflies and hummingbirds and come in a variety of colors. In summary:
- Bloom season: summer to fall (July to frost)
- Flowers appear on new growth each year
- Pruning in early spring promotes blooms
- Bloom duration: several weeks or continuous through fall in some varieties
This means butterfly bushes should be expected to bloom mainly from mid-summer onwards until the fall frost in most gardening zones.
