Iris Flower When To Plant. However most irises show their famous flowers in the early summer while some also bloom for a second time in the late summer. Place the rhizome on a ridge of soil placing the roots in the soil but the rhizome just above soil level.
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Removing the spent flowers from some types of plants encourages the development of subsequent blooms. The tall bearded iris varieties are best planted closer to fall because they go dormant in early to mid-summer. Garden Tools Paintings for Affordable Prices.
However this is not the case with bearded irises.
Irises set flower initials in August determining how many flowers each stem will carry the following May. 16042020 Iris the Flower. To set the maximum number of flower initials the plants need to be undisturbed and warmed by sunlight between August and October. Spring planting is discouraged but can be done under abnormal circumstances.