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Each year brings new plant varieties. Check out 5 of the best new perennials of 2021.
Plant growers and breeders have come up with an innovative lineup of new perennials for 2021, including groundcover ajugas with multi-colored leaves, a compact version of a pollinator-magnet native flower, and a very good-looking herb.
Gardeners already have lots of great coralbells to pick from, but this newcomer from Oregon’s Terra Nova Nurseries is one of the best yet in dealing with heat and humidity. Grande Amethyst has wavy leaves in a rich, bold color along with color-coordinated wiry pink flowers that produce from July into September.
Plants grow a stocky 14 inches tall (30 inches counting the flowers) and do well in sun, shade, and everything between. It’s hardy in Zones 4-9.
Ajuga, or “bugleweed”, is getting a makeover for 2021 with new leaf-color choices, including the first golden and chartreuse varieties. The seven-variety, bird-named Feathered Friends series from Michigan’s Garden Solutions feature two of these new shades – Cordial Canary and Tropical Toucan – as well as gold/burgundy/green blends (Fancy Finch, Petite Parakeet, and Parrot Paradise), and ones that are nearly black (Noble Nightingale and Fierce Falcon).
All are hardy in Zones 4-8 and produce bluish-purple flower spikes in spring. Ajugas grow in spreading, four-inch-tall mats and do best in shade to part shade.
Ironweed is a late-summer to early-fall purple bloomer that doesn’t show up in many gardens, mainly because it’s so tall (five feet and up), prone to leaning, and susceptible to rust and mildew leaf diseases.
Dr. Jim Ault at the Chicago Botanic Garden developed this new hybrid that solves all three of those issues. ‘Summer’s Swan Song’ grows only three feet tall, has interlocking branches that hold it into a compact bush shape, and tested out with no disease in Chicago Botanic Garden trials despite other infected ironweed varieties around it.
The variety also blooms heavily from September into October and has narrow, olive-green leaves and red-purple stems. As with all ironweeds, pollinators love it. It’s hardy in Zones 4-9.
Most people think of oregano as a cooking herb. But this winter-hardy perennial also makes a good-looking sunny trailer, especially when it’s blooming. Although it’s perfectly edible, Proven Winners’ new ‘Drops of Jupiter’ oregano was selected for its ornamental value – blooming long and heavily in miniature clouds of purple-pink flowers. The foliage is also chartreuse instead of plain green.
‘Drops of Jupiter’ plants grow about two feet tall, do best in full sun, and are deer-resistant and bee-friendly. It’s hardy in Zones 4-9.
Proven Winners also is introducing a breakthrough new color in its high-performing line of Summerific hardy hibiscus. The new ‘French Vanilla’ variety has the familiar huge, trumpet-shaped, late-summer flowers of hardy hibiscus but it opens in a custard-yellow shade before turning white with a rosy-red throat. The flowers are ruffled and seven to eight inches wide.
Plants grow about four feet tall and do best in full sun to light shade. It’s hardy in Zones 4-9.