Symphyotrichum novae-angliae Seeds | New England Aster
LATIN NAME: Symphyotrichum novae-angliae
COMMON NAME: New England Aster
Plant Profile
Most late-summer borders owe their final explosion of colour to a single plant that simply refuses to stop until hard frost: the New England aster. One upright stem can carry more than fifty violet ray florets around a glowing yellow centre, and a mature clump opens hundreds of these heads at once, turning a tired border into a sheet of purple just as most other perennials have finished for the year.
The species is built on texture. The stems are stout and covered with short bristly hairs that run in vertical lines, and the lance-shaped leaves grip the stem directly with ear-like lobes at their base rather than narrowing to a stalk. Lower leaves wither early while the upper ones stay small and crowded, which is why a well-grown plant looks leafy only toward its top third. The rough grey-green foliage is a useful field mark when the plant is not in flower.
Gardeners confuse the New England aster with the New York aster (Symphyotrichum novi-belgii), but the two are easy to separate on stem and leaf. The New York aster has smooth nearly hairless stems and narrow leaves that do not clasp, and it tends to lean and flop. The New England aster is stiff, hairy, and self-supporting, with the broader stem-hugging leaves described above. Flower count seals it: New England aster heads carry far more ray florets per head and sit in a looser domed cluster.
In planting design the New England aster earns its place as a back-of-the-border anchor. It rises tall, often well above a metre, and holds its colour while the front of the bed is already going over. Because the flowering window lands late, it pairs naturally with the grasses and the sedums that peak at the same time, and it supplies a structure that hides the dying foliage of earlier bulbs.
The stems are first-rate for cutting. Cut when the lowest florets on a head have opened but most are still tight, and the cluster will unfold indoors over several days. For dried work, hang the stems upside down in a dim airy room; the colour fades from violet to a soft papery mauve that still reads well in winter arrangements.
Science & Biotechnology
The appeal of the New England aster is not only visual. Like many Asteraceae the plant loads its foliage and floral parts with volatile compounds, and the open flower heads release a light resinous scent built on monoterpene hydrocarbons. Work on related aster flowers repeatedly finds limonene and alpha-pinene among the leading notes, the same compounds that give so many aromatic herbs their lift, and the same ones that broadcast an open flower head to a searching bee.
The leaves and stems also hold sesquiterpene lactones, the bitter defence molecules typical of the daisy family. These are the compounds that make raw aster foliage unpalatable to deer and rabbits, and they are part of the reason cut stems stay firm in the vase instead of collapsing. Tissue-culture studies on several Symphyotrichum species have used leaf explants to regenerate entire plants, a route breeders take when they want to multiply a prized colour form without waiting on variable seed.
What matters in the garden is the message those volatiles send. The scent, together with the flat yellow disc at the centre of each head, draws a late wave of bees, hoverflies, and butterflies that have little else to feed on. Few native flowers bloom as generously in the cooling weeks, which is why the New England aster is a backbone plant for anyone trying to support pollinators late in the season.
Uses & Benefits
Beekeepers value the species for a clear reason. A planting in full flower becomes a humming sheet of foragers, and the nectar supports a late honey crop with a bright lightly floral note. In regions where the Monarch butterfly still migrates, the aster is one of the last fuel stops on the route, which gives it a conservation value well beyond the ornamental.
Growing from Seed
From the grower’s bench the New England aster is straightforward, but it starts with a fine seed that behaves its own way. The seed is small and flattened and equipped with a tuft of hairs that helps it travel on wind; sown in a tray it needs light to break dormancy, so it is pressed onto the surface of a moist gritty mix rather than buried.
Set young plants out by their expected mature height rather than by a fixed grid. Short cultivars such as ‘Purple Dome’ can stand thirty centimetres apart, while tall wild-type clumps want sixty centimetres or more so air moves through the base and the stems stay clean. Thin seedlings so the strongest remain, and do not crowd the row, because crowded asters invite mildew on the lower leaves.
Once a clump has flowered and the top dies back, lift and divide it every third year to keep the centre from rotting out. Replant the vigorous outer pieces in refreshed soil and compost, and discard the woody heart. Division also lets you keep a cultivar true, since seedlings from a named form will not match the parent.
Our Take
If you only grow one late perennial, make it this one; the return in colour and insect life is out of proportion to the effort. For a longer season of related daisies, pair it with the New York aster, the purple coneflower, and the black-eyed Susan, then tuck a drift of coreopsis at the front for earlier yellow. Give the aster sun, a little support, and room to breathe, and it will outlast every shorter-lived neighbour in the bed.
Related Reading
More species in the same orbit as New England Aster: