Tall, flowering perennials are showstoppers in any garden or landscape. These stunning plants, some of which can grow up to 8 feet tall, will return to bloom year after year with proper care. Plant them along fences, against a house or toward the back of your flower bed. Many will need to be staked or supported, so take that into consideration when planning which tall, flowering perennials you are going to include in your garden.
The butterfly bush features masses of long, purple flowers. As the name implies, this fast-growing bush attracts butterflies. This flowering perennial thrives in full sunlight, although it can tolerate partial shade, and can grow upward of 6 feet. Because it is so hardy and fast spreading, it is considered invasive and aggressive in some states.
Pampas grass is a dense ornamental. This huge perennial can grow up to 13 feet tall and features beautiful, feathery, cream-colored flowers. Pampas grass is often grown as a barrier because the foliage is so dense. The perennial is very hardy and requires well-drained soil and lots of sunlight to thrive. The huge size of pampas grass also requires a lot of space. It can also spread and become invasive if not maintained properly.
Delphinium "Black Knight"
The "Black Knight" variety of delphinium is appreciated for its deep blue flowers, but it is also a tall perennial, rising to 6 feet in height. This showy plant has tall spikes lined with bell-shaped flowers that rise above a neat mound of foliage. Delphinium "Black Knight" thrives in full sun in temperate climates, especially the Pacific Northwest.
Hollyhock plants are an old-fashioned favorite with most home gardeners. These stunning flowers feature tall (up to 7 feet) spikes covered with beautifully ruffled flowers. They bloom in the spring, prefer full sun and come in a wide variety of colors, including pink, white and purple. There are more than 60 species of hollyhocks, some of which need a cold period to bloom.
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