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Iris forrestii. Iris subg. Limniris. Limniris forrestii (Dykes) Rodion. Iris forrestii is a species of flowering plant in the genus Iris, also the subgenus Limniris and in the series Sibiricae. It is a rhizomatous herbaceous perennial, from China (including Tibet) and Burma. It has linear grassy-like leaves, long thin stem and fragrant yellow ...
Iris wilsonii will tolerate temperatures of up to – 15 degrees C. But may survive lower if protected or well mulched in winter. It is hardy to USDA Zone 6–8, and Zone H2 (which means Hardy to -15 to-20oC (5 to -4oF ), in Europe. It prefers soils with a ph level of 5.5 to 7 (acidic to neutral) and more moisture tolerant.
Iris giganticaerulea (the giant blue iris) is the largest species of the Louisiana irises. [2][3] It has very large green rhizomes, which are between 5 and 12 inches (13 – 30 cm) long and 0.75 to 1.5 inches (2–4 cm) thick. [4][5] They are shallow rooted, marked with the scars (of the previous seasons) leaves, with many branches, which can ...
Illinois state-owned protected areas include state parks, state forests, state recreation areas, state fish and wildlife areas, state natural areas, and one state trail. These areas are all administered by the Illinois Department of Natural Resources. In addition, dozens of state historic sites are administered by the Illinois Historic ...
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Division (horticulture) Division, in horticulture and gardening, is a method of asexual plant propagation, where the plant (usually an herbaceous perennial) [ 1] is broken up into two or more parts. Each part has an intact root and crown. [ 2] The technique is of ancient origin, and has long been used to propagate bulbs such as garlic and saffron.
Iris himalaica Dykes. Limniris clarkei (Baker ex Hook.f.) Rodion. Iris clarkei is a species in the genus Iris, also the subgenus of Limniris and in the series Sibiricae. It is a rhizomatous herbaceous perennial, from Asia, including north east India, Nepal, Tibet, Bhutan, Burma and in China. It has grey-green leaves, long and thin green stem ...
Iris delavayi will tolerate temperatures of up to −15 degrees C. [7] But may survive lower if protected or well mulched in winter. [16] It is hardy to USDA Zone 5–8, [5] [9] and Zone H2 (which means Hardy to −15 to −20 °C (5 to −4 °F) [26]), in Europe. [10] They prefer soils with a ph level of 5.5 to 7 (acidic to neutral). [9]
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related to: should iris be mulched in spring zone 11 in illinois state forest nursery