Pugster Blue Butterfly Bush, scientifically known as Buddleja x 'SMNBDBT' Pugster Blue, is a compact and dwarf cultivar of butterfly bush. Butterfly bushes are known for their attractive, fragrant flowers that attract butterflies and other pollinators. Here are some key features of the Pugster Blue Butterfly Bush:

1. Size: Pugster Blue is a compact and dwarf butterfly bush, typically reaching a height of about 2 feet with a similar spread. Its smaller size makes it suitable for smaller gardens, containers, or as a border plant.

2. Flowers: This cultivar is valued for its prolific and vibrant blue flowers. The flower spikes are dense and appear throughout the summer, attracting butterflies and other pollinators. The color is a rich, true blue, which is somewhat unusual among butterfly bush varieties.

3. Foliage: Pugster Blue has gray-green foliage that provides a nice backdrop to the colorful flowers. The leaves are lance-shaped and add to the overall attractiveness of the plant.

4. Sunlight Requirements: Butterfly bushes, including Pugster Blue, thrive in full sun. Adequate sunlight exposure ensures vigorous growth and abundant flowering.

5. Soil and Watering: These plants prefer well-draining soil and are somewhat drought-tolerant once established. Regular watering is beneficial, especially during dry periods, to encourage healthy growth and flowering.

6. Hardiness: Pugster Blue Butterfly Bush is generally hardy in USDA zones 5 to 9, making it adaptable to a range of climates.

7. Continuous Blooming: One of the advantages of Pugster Blue is its ability to bloom continuously throughout the summer, providing a long season of color.

8. Landscape Use: This butterfly bush is often used in landscapes for its compact size and attractive flowers. It works well in mixed borders, cottage gardens, and as a focal point in smaller spaces.

When planting Pugster Blue Butterfly Bush, it's essential to provide well-draining soil and ensure good air circulation around the plant. Regular deadheading (removing spent flowers) can encourage continuous blooming. Like many butterfly bushes, Pugster Blue may benefit from pruning in late winter or early spring to maintain its shape and size.