Spacing will vary depending on variety. Back fill with just enough soil so that the rhizome is just below the surface.
Unlike most plants irises do best when their rhizome the brown root like structure at their base resembling a potato is slightly exposed to the air.
How to plant iris rhizomes. You should see buds where growth emerges on one side and small roots on the other. One common mistake first timers make when planting irises is to plant them too deep. Rhizomes such as iris iris hybrids are really underground stems and grow just below or on the soil surface.
Dig a shallow hole with your garden trowel. Depending on the variety space three inches apart or up to two feet apart. Plant rhizomes individually or in groups of three with the noses facing each other.
The bud side is planted facing up. Plant the rhizome so that its top is exposed. Spread each rhizome s roots to encourage well established spread.
Irises should be planted so the tops of the rhizomes are visible and the roots are spread out facing downwards in the soil. Plant dutch japanese and siberian iris rhizomes 3 to 4 inches deep. If you plant iris bulbs in pots you can directly put them on its surface.
The rhizome needs approximately six hours of full sun per day. Lay the rhizome in the prepared hole with the leaves above the surface of the soil. Transplanting an iris rhizome isn t a complicated process.
For bearded iris dig a hole twice as big as the rhizome. Plant your rhizomes at or just barely below the surface of the ground. After that give a little push so that they get inside the soil.
For each dig a hole 10 inches wide and four inches deep. You should find a location that provides well draining soil and ample sunlight. Iris rhizomes that are planted too deep will not flower.
Create a small ridge down the middle. Corms such as crocus crocus vernus and gladiolus gladiolus hybrids are a type of compressed stem that contains food and has a bud on top. However in extremely hot climates or with very light soils cover rhizomes with up to one inch of soil.
Place iris rhizomes horizontally in the ground. Plant the iris rhizomes to the new location. Bulbs may be hardy spring and early summer flowering or tender summer flowering.
These two grow requirements are vital to ensure the rhizome remains dry to avoid rot. If you do it it will help you to make sure that the bulbs stay erect.
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