Plant Astra Blue Dwarf Balloon Flower in well-drained soil with full sun to partial shade. Space plants 12-18 inches apart. Water regularly, keeping the soil consistently moist but not waterlogged. Fertilize with a balanced, slow-release fertilizer in spring. Deadhead spent blooms to encourage continuous flowering. Protect from strong winds and provide support if necessary. In colder climates, apply a layer of compost in late fall for winter protection. Divide clumps every 3-4 years in early spring to maintain vigor.