Growing iris flowers in Minnesota requires well-drained soil, but not too much water. After flowering, the plants go dormant for the rest of the summer. Planting should be done by drilling a hole wide and deep enough to receive the root system, with the base of the leaf system or crown approximately 1 inch below the final soil level. Make sure there are no air pockets around the root system and water the iris abundantly at the time of planting and for the first few months after planting, without allowing it to dry out.
Additional cultivation can increase yield, such as spreading the roots on a fully composted manure mound at the base of the hole and applying a weak root-stimulating hormone solution.Early fall is traditionally the best time to plant bare root material, giving roots and rhizomes a chance to anchor before winter. In northern regions, spring planting can also be successful. Within your garden, transplanting with an earthen root ball avoids the impact of the transplant. Siberians planted in spring are expected to bloom the following year, while those planted in fall cannot be expected to bloom until the second year.
Water them only if the soil is extremely dry or after transplanting. Mulching helps retain moisture, and excess moisture causes rhizomes to rot.A phenomenon caused by weather called polyethylene petal can occur in which an iris flower will have more parts than it normally has. An advantage of planting a variety of different kinds of irises is that (generally speaking) the shorter the iris, the sooner it will bloom. Iris flowers have three main structures, and the names of varieties are usually inspired by one of these parts.Dividing groups of bearded iris plants every three or four years in late summer is an easy way to propagate new plants and improve flowering of the original plant.
It's a magical time in the garden when these flowers unfold their pencil-thin buds to reveal a kaleidoscope of colors, which begins as early as March in warmer regions.