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Perennial 8 9 feral major F Selfheal: Prunella vulgaris: Perennial 7 8 no feral minor F Lungwort: Pulmonaria spp. Perennial 5 5 no feral minor F Appalachian mountain mint: Pycnanthemum flexuosum: Perennial 8 10 minor F Azalea: Rhododendron spp. Perennial 6 8 no ornamental minor F Russian sage: Salvia × floriferior: Perennial 7 9 can be ...
It has been adapted by and to other countries (such as Canada) in various forms. A plant may be described as "hardy to zone 10": this means that the plant can withstand a minimum temperature of 30 to 40 °F (−1.1 to 4.4 °C). Unless otherwise specified, in American contexts "hardiness zone" or simply "zone" usually refers to the USDA scale.
Not all species are hardy in the upper zones; C. sativus is winter hardy in USDA zones 6 through 8, and C. pulchellus is hardy in zones 5 through 8. [ 92 ] Some are suitable for naturalizing in grass, but mowing off the foliage before it turns yellow produces short lived plants.
Erosion control: Because plant materials (stems, crowns, etc.) can remain in place year-round, topsoil erosion due to wind and rainfall/irrigation is reduced [11]; Water-use efficiency: Because these crops tend to be deeper and more fibrously-rooted than their annual counterparts, they are able to hold onto soil moisture more efficiently, [12] while filtering pollutants (e.g. excess nitrogen ...
The plant is most invasive in wetland habitats, including riparian zones; from there it easily spreads to other ecosystems, such as sagebrush. [3] It is perceived as a threat to salt marshes in southern New Hampshire, prompting the Department of Environmental Services and the U.S. Fish and Wildlife Service to look for it in the Hampton–Seabrook Estuary in 2008, where it is thought to have ...
Gunnera tinctoria, known as giant rhubarb, [2] Chilean rhubarb, or nalca, is a flowering plant species native to southern Chile and neighboring zones in Argentina.It is unrelated to rhubarb, as the two plants belong to different orders, but looks similar from a distance and has similar culinary uses.
Print/export Download as PDF; Printable version; In other projects ... Pages in category "Perennial plants" The following 90 pages are in this category, out of 90 ...
Columbine is a hardy perennial, which propagates by seed. It will grow to a height of 40–50 cm (15–20 in). It will grow to a height of 40–50 cm (15–20 in). It will grow in full sun; however, it prefers growing in partial shade and well drained soil, and is able to tolerate average soils and dry soil conditions.