Garden & Landscape Tips

Aster Magic Purple
Aster Magic Purple™ is one of the most compact versions of New York aster.
© George Weifgel

Tricyrtis flower
Toad lily features white, lavender-spotted flowers.
© George Weigel

Mum’s not the only plant when it comes to fall flowers for the garden. A lesser known lineup of perennials waits until after Labor Day to strut its stuff too, giving gardeners more choices other than classic chrysanthemums. Most are readily available at garden centers, but not always displayed as prominently as bodacious mums. Expand your plant palette and see if you like any of these:

Asters (Symphyotrichum).

The daisy-like or pom-pom flowers of asters generally bloom purple to blue-purple, although they also come in pink and white. All species of Symphyotrichum are U.S. natives (true Aster species are mostly Eurasian) and make excellent late-season food sources for birds and pollinators. The New York, New Jersey, calico, heath, smooth, and wood species of this large genus are especially favored.

Asters do best in full sun. Most grow 2' to 4' feet tall, although you'll find smaller selections, including 'Woods Purple' (16” tall) and 'Sapphire' or Magic Purple™ (14” tall). All are winter-hardy in Zones 4-8.

Toad lily (Tricyrtis hirta).

This underused early fall-blooming perennial is native to Japan. It produces small, orchid-like flowers with creamy-white petals irregularly spotted with lavender. It flourishes in moist soil in shade to part-shade settings, where it combines well with ferns, astilbes, and coralbells (Heuchera). Plants grow 1' to 2' tall; hardy to Zones 4-8. A side benefit: deer don't like them.

Goldenrod
'Golden Fleece' is a compact variety of goldenrod that blooms heavily.
© George Weigel

Orange dahlia
Dahlias are among the showiest of all flowers and bloom in most of the same colors and flower shapes as mums.
© George Weigel

Sedum Autumn Joy with switchgrass.
This planting of sedum 'Autumn Joy' is turning rust-colored by mid-fall as the switchgrass (Panicum virgatum) behind it has turned golden.
© George Weigelf

Goldenrod (Solidago rugosa, hybrids, and selections).

Goldenrod gets a bad rap because many people know it as “that big yellow-flowering weed along the road that makes you sneeze.” In fact, inconspicuous ragweed is usually the hay-fever culprit, blooming at the same time with abundant pollen dispersed by wind; goldenrod pollen is heavy and sticky, distributed by animals.

Goldenrods are native to the U.S. with yellow or golden flowers. While some species are overly rampant for home gardens, selections such as 'Golden Fleece,' 'Baby Gold' and Little Lemon® (all under 2' tall) were bred for smaller spaces. They are well-behaved, compact, bloom heavily, and attract pollinators. Goldenrods do best in full sun, and tolerate wet or dry soil. Zones 4-9.

Dahlias (Dahlia species, hybris, and selections).

This Mexican genus trumps even mums for sheer brash showiness. Its blooms come in many of the same colors and flower shapes as mums -pompons, daisies, anemone-centered, and balls, even some that produce single or double flowers as wide as dinner plates. They put on a head-turning late-season show in practically all colors (no true blue); bloom time is spread over many weeks.

Dahlias grow from food-storing tubers similar to potatoes. In Zone 7 and colder, tubers aren't winter-hardy in the ground and must be dug and overwintered in a frost-free place after first frost. Dahlias thrive in full sun and make excellent cut flowers. Stake taller sorts. 1'-5' tall; Zones 8-11.

Turtlehead (Chelone).

Native perennial turtlehead gets its name from its unusual hooded flowers (fancifully reminiscent of a turtle’s head) held in spiky clusters. Pink-turtlehead (Chelone lyonii) blooms from midsummer to early fall, white turtlehead (Chelone glabra) is a little later. Plant turtleheads in sun to part shade, preferably in moist soil. Both species attract pollinators and grow 2' to 3' feet tall. Hardy in Zones 3-8.

Sedum (Hylotelephium spectabile).

Sedum 'Autumn Joy' is one of America’s top-selling perennials. It sports pinkish broccoli-like clusters of flowers, which turn rust color as fall temperatures drop. Some lesser-known cousins are good choices as well. These include the more compact cultivars 'Neon' (18") and 'Brilliant' (24"), along with hybrid 'Matrona' (2'-3') that has fleshy and glossy, dark-burgundy leaves.

Blooming from late summer into fall, these sedums tolerate drought, poor soil, and heat well, and are seldom bothered by pests or diseases. Although not native to the U.S., bees and butterflies flock to the flowers. Hardy in Zones 3-9.

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