Butterfly bushes (Buddleja davidii) typically grow to a size range of about 5 to 12 feet tall and 8 to 10 feet wide, with some sources noting mature sizes up to 15 feet tall in certain regions
. The size can vary depending on the variety:
- Standard large varieties usually reach 5 to 8 feet tall and wide, sometimes up to 10-12 feet in ideal conditions
- Dwarf varieties grow smaller, generally about 2 to 4 feet tall and 2 to 4 feet wide, suitable for smaller gardens
- Some cultivars like 'Dark Knight' can grow 6 to 8 feet tall and 4 to 6 feet wide
- Compact or dwarf cultivars such as 'Ellen’s Blue' or 'White Ball' max out around 3 to 4 feet tall
Butterfly bushes grow rapidly and can reach mature size within 1 to 2 growing seasons
. They have an arching, bushy habit and produce long, spiked flower clusters that attract butterflies. In summary, butterfly bushes generally grow between 5 and 12 feet tall and 6 to 10 feet wide, with dwarf varieties staying much smaller around 2 to 4 feet in height and width
