Plant New England Aster in well-drained soil with full sun exposure. Space plants 18-24 inches apart. Water regularly, especially during dry spells, to keep the soil consistently moist but not waterlogged. Fertilize in early spring with a balanced, slow-release fertilizer. Pinch back stems in early summer to encourage bushier growth and more blooms. Cut back to the ground after flowering in late fall or early spring to promote healthy growth. Divide clumps every 2-3 years in early spring to maintain vigor.