A new twist on a much-loved garden favourite, B. Buzz™ Ivory is the world’s first patio Buddleja! These attractive compact plants are loved by bees and butterflies, but won’t take over your garden. Buddleja Buzz™ Ivory is easy to grow and problem-free with a super long-flowering period. Perfectly proportioned for patio pots and smaller gardens. (Thompson Morgan quote)
My personal view is the Buzz™ series are better in the ground.
B. Buzz™ Ivory I can recommend has a good compact white flower
Most Buddleja are root -hardy in the ground but in a container will need protection in very cold winters.
This series of plants was developed by Thompson & Morgan of Ipswich, Suffolk, England in a quest to create new hybrids which were more compact and easier to grow in the modern small garden. After 8 years of breeding and selection, the Buzz™ series was born.