![]() ![]() Make 2 rows in the soil with a small ridge in between. They can be top dressed with a low-nitrogen fertilizer (avoid high-nitrogen as it can cause rot). ![]() Iris rhizomes should be planted so that they are slightly visible on the soil surface, or thinly covered in warmer climates. At this time, organic matter can also be mixed in. Prepare the planting beds up to two weeks ahead by loosening soil to a depth of 10-12 inches to establish good drainage. ![]() Raised beds are ideal for growing irises, as they provide the good drainage needed. Where to plant:Ĭhoose a sunny location for your irises where they won’t be subject to standing water. In hotter climates, they can be planted in September or October. The best time to plant iris rhizomes or bulbs is late summer to early autumn to allow them plenty of time to establish roots before the growing season ends. Photo by: Nadzeya Pakhomava / Shutterstock. They are also good for rock gardens and forcing in pots. Reticulated irises are well-suited for growing in groups, but should be divided every two to three years to prevent overcrowding. Dutch hybrids tend to bloom earlier than the tall bearded rhizomatous varieties and are the well-known variety featured in florist’s spring bouquets. They all shed their leaves after the blooming season and go into a dormant phase over summer. This group includes the Dutch hybrids and the smaller reticulated or dwarf irises. Planting iris full#
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