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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 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 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 ...
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]
They can be mulched with peat or garden compost in spring. [22] [10] They can also be fed in spring with a general fertiliser but it is not essential. [7] They can be divided after flowering (in early summer) if the clumps become too big and congested. [10] Also propagation is best carried out by division of the rhizomes. [22]
The iris should be planted in well prepared ground (with added compost or organic matter). They should be planted 3–5 cm (1–2 in) below the ground level. They then need to be watered, and kept moist for the next few days, to prevent wilting and transplant shock. They should be spacing at 45–60 cm (17.5–23.5 in) apart.
In 2000, a study was carried out on the genetic diversity of Iris cristata and Iris lacustris.It was found that Iris cristata, is a widespread species of unglaciated regions of eastern North America, it would have a wide genetic diversity similar to other known widespread plant species, compared to the threatened Iris lacustris, which only occupies glaciated habitats on Great Lakes shorelines ...
Iris (plant) Iris. (plant) Iris is a flowering plant genus of 310 accepted species [1] with showy flowers. As well as being the scientific name, iris is also widely used as a common name for all Iris species, as well as some belonging to other closely related genera. A common name for some species is flags, while the plants of the subgenus ...
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