What is the fastest growing tall perennial?
Hibiscus (Rose Mallow) Hibiscus are an excellent, fast growing perennial to quickly add height to the landscape. Newer Hibiscus hybrids, like those in the SUMMERIFIC® series, have sturdier habits that do not flop open like older types. Delphinium, hollyhock, foxglove, tall zinnias, gladiolus, rocket mix snapdragons. I would mix sunflowers in with other tall perennials.During the summer, consider classic pairings like Phlox and Geranium. These perennials complement English roses beautifully and require minimal maintenance. Available in a variety of colours, Phlox and Geranium can be chosen to harmonise perfectly with the shades of your roses.
What is the best plant for tall privacy?
For rapid privacy solutions, few plants can rival the Green Giant Arborvitae. Known for its fast growth and dense foliage, this evergreen is perfect for screening out neighbors and undesirable views. With a height of 20′-30′ and a width of 10′-15′, it provides ample coverage in full sun to partial shade. GREEN GIANT ARBORVITAE This hybrid Thuja typically grows 3 feet per year, with some reports circulating of it growing 5 feet in one year! If you need a fast-growing, large, evergreen Arborvitae hedge, Green Giant is a perfect choice.Our #1 most popular privacy tree, the Thuja Green Giant is a fast-growing evergreen tree that can grow in Zones 5 to 9 at a rate of 3 to 5 feet per year. After three years, it can reach 15 to 20 feet, and at maturity can grow up to 30 to 40 feet fall.