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Season to divide (US) Frequency Asters Aster: Early spring 1-3 years [6] Beebalm Monarda Early spring 1-3 years [6] Black-Eyed Susans Rudbeckia Early spring 3-5 years [6] Hosta Hosta: Early spring 5-10 years [6] Siberian iris Iris siberica: Early spring/Fall 5-10 years [6] Peony Paeonia spp. Late Summer/Early Fall rarely [5] Purple cone-flower ...
Learn about planting iris rhizomes and growing iris flowers. We explain how to care for irises including bearded irises, and their soil, water, sun needs. This Tip Will Help Your Irises Thrive
Plants require dividing every 3–4 years to promote good flowering. They can combine with other plants but tend to 'move' to suitable positions. [14] [15] [32] The iris seed is not hard to raise but a very slow process. [33] It can take many months to germinate (between 3–12 months) with a 50% germination average. [14]
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Irises can generally be propagated by division, [49] or by seed growing. [47] Every three years, the clumps of irises are normally divided, as the plants are highly likely to get bacterial rot if they suffer any moisture or humidity. They are best re-planted in late September when temperatures are low and humidity is also low.
Iris typhifolia has been very useful to plant breeders and hybridisers, due to its hardiness, foliage, flower markings. [7] and because it flowers earlier than other siberian irises. [5] [11] Iris typhifolia 'China Spring' was the first introduced Iris typhifolia hybrid; Iris typhifolia 'Caitlin's Smile' – with erect foliage and purple blue ...
Iris tridentata is a species in the genus Iris, it is also in the subgenus Limniris and in the series Tripetalae. It is a rhizomatous perennial , from the Southeastern United States. It has a cord-like rhizome, bright green leaves, long stem and fragrant flowers in spring in shades of blue.
Iris tectorum (also known as roof iris, Japanese roof iris and wall iris) is a plant species in the genus Iris, it is also in the subgenus Limniris. It is a rhizomatous perennial. It is native of China, Korea and Burma, with lavender-blue, bluish-violet, purple-blue, blue-lilac or sky blue flowers. There is a white form as well.