Platycodon grandiflorus 'Astra White' (Balloon Flower 'Astra White') is a compact balloon flower that brings a tidy, mounded habit and bright, clean color to small spaces. You will love the inflated, balloon-like buds that form before bloom, then open into upward-facing, star-shaped white flowers in summer. With its naturally neat size, it fits easily at the front of a border, along a walkway, or in a patio container.
Give it full sun to part shade. In hotter climates, a bit of afternoon shade can help the flowers last longer, while in cooler areas it can take more sun. Plant it in moist, well-drained soil, water regularly during establishment, and then keep moisture fairly even through the growing season. Avoid waterlogged sites, especially in winter.
At maturity, this dwarf selection is typically about 8-10 inches tall and roughly 8-10 inches wide, making it easy to tuck into mixed plantings without crowding neighbors. It pairs well with other compact perennials and ornamental grasses, and it is useful for edging where you want a clean, refined look without constant trimming.
Balloon flower is known for being slow to emerge in spring, so mark its spot and be patient. Once growing, it is low maintenance: deadhead for a tidier display and possible additional bloom, and cut stems back after flowering if desired. Because it forms a substantial root system, set it where you want it and minimize digging around the crown.