Plant library · Perennial Flowers
Symphyotrichum novae-angliae
New England Aster is a tall perennial for bringing vivid purple daisy flowers into the garden from late summer through fall. At roughly 4½ feet tall, it reads best as a substantial vertical layer rather than a low border filler. Its late flowers extend seasonal interest after many summer perennials have finished, while its native North American character and pollinator-friendly bloom make it well suited to naturalistic and wildlife-focused planting plans.
Place Symphyotrichum novae-angliae toward the back or middle of a deep sunny border, where its height will not hide shorter plants or narrow a path. Use repeated clumps to create a broad fall display, leaving an access edge for cutting back and checking stems. It also suits a meadow-style area, rain-garden planting, or a loose drift beside other plants that will not be crowded by its mature canopy.[1][2]
Set plants 2½ feet apart, center to center. Each plant can reach about 3 feet wide, so a closely repeated planting will knit into a near-continuous mass as it fills out. In a border, reserve a strip about 3 feet deep for a single row and keep nearby paths, lawn edges, and smaller perennials outside that footprint. Avoid squeezing plants against a fence or wall where stems and foliage will be hard to reach.
Give New England Aster full sun and regular water, especially where the planting must stay full and upright through its late bloom season. A moist, well-drained bed with good air movement is a practical fit. Keep it out of persistently waterlogged winter ground, and do not pack it tightly among dense neighboring foliage.[1][3]
Pinch or cut stems back several times early in the growing season, stopping by mid-July, to build a shorter, bushier clump; this can shift flowering later. Plan for its main floral display from late summer into fall, and allow space to cut stems down after flowering if the planting needs a tidier winter outline or limits on self-sowing.[1][2]
The tall stems may need support, particularly in exposed sites or where plants stretch above lower companions. Leave circulation space around the clump, since crowded foliage is more prone to foliar disease problems. A support ring or discreet stakes are easiest to install early, before the plant reaches its full 4½-foot height and nearby plants close in.[1][3]
Editorial content updated 2026-07-20.