Echinacea
Although many of the coneflowers are considered midsummer perennials, with deadheading they will flower right until the end of the gardening season. New cultivars boast flowers in shades of orange, salmon and yellow as well as the traditional purple, pink and white.
Yellow corydalis (Corydalis lutea)
This dainty little perennial begins flowering in late May and continues through until autumn frosts. It’s ideal for the front of the border or for rock gardens.
Boneset, Joe-pye weed (Eupatorium)
For gardeners who like to attract butterflies, this tall perennial, native in some parts of North America, is a great performer with its broad flower heads of dusky rose. Newer cultivars boast bronze-purple foliage that makes the plant as attractive in bloom as out.
Helenium
Helen’s flower is also known by the unappealing name ‘sneezeweed’, but it doesn’t trigger allergies. This underused and beautiful perennial covers itself in small daisy-like flowers in rich autumn colours.
Hibiscus
Along with the woody species of hibiscus, there are perennial species that die right to the ground but return each year, displaying spectacular, huge, flowers.
Fall Asters
Probably the perennial we most commonly associate with autumn gardens. You can find these beauties ranging from compact plants less than a foot high to towering specimens of 5 feet or more. Colours range from hot pink and magenta to cool mauve, lavender, and white.
Get ready for gardening indoors: