Magic Valley Iris Society

Magic Valley Iris Society

Upcoming Activities

Magic Valley Iris Society Rhizome Sale

This very special event will be on August 3rd, 2024 at Twin Falls City Park. The sale is on the west side of Twin Falls City Park, across from the United Methodist Church. Public sale starts at 10:00 am-2:00 pm. It is always a treat to see a new iris bloom in the spring of the year. Our prices are very reasonable for perennial plants. Our dues are ten dollars a year, four newsletters, four meetings, and a new rhizome at the August meeting.

Please Come Join Us!

American Iris Society Convention will be held June 2-7, 2025

Artistic Judging & Training
for the Magic Valley Iris Society


The MVIS had the incredible opportunity to host Master Judge Gary Clark for an artistic judging training session. He put together 20 show bouquets highlighting the different styles that could be entered in the iris show. Because irises are not in season his designs included chrysanthemums, roses, gladiolus, and greenery. He walked through all the elements that would be judged in a garden or iris show and pointed out ways his own designs met the criteria or would be docked points during judging. Attendees then had the opportunity to design their own arrangements, using vases they brought themselves and flowers provided by the MVIS.

Planting and Growing Irises:


Irises are among the easiest of perennials to grow, and they give an abundance of beauty with minimum care. The iris has a thick fleshy root called a “rhizome” (pronounced rye-zome) about like a tough potato in texture. When you buy a new iris, you will probably receive a rhizome with clipped roots and leaves. It can remain out of the ground for a week or two without serious harm, but the sooner it is planted, the better. It helps if you soak the rhizome overnight in water just before you plant. To plant your irises, choose a sunny spot in well drained soil. Prepare soil well by spading or turning over the soil with a garden fork to a depth of at least 10 inches. Spread fertilizer and work it into the top of the soil. A well prepared bed will result in better growth and more bloom. The soil should be light. If it is clay soil, add very coarse sand and humus. Bone meal and a good garden fertilizer, low in nitro­gen, are good for irises, but manure should be used only after it has aged for about a year. Otherwise, it may cause rot. The roots must be buried firmly to hold the plant in place, but the rhizome should be near the surface.

If you have several plants, plant them at least a foot and a half apart, “facing” the same way. The rhizomes will then increase in the same direction, without crowding each other too soon. In about 2 or 3 years, the new rhizomes will begin to crowd each other and you will want to di­vide the plants.

You will have so many new rhizomes that you can share them with your friends and neighbors. Perhaps you received your first rhizomes from a friend. When digging, keep all plants carefully labeled with their names, for sure identification. It is wise to keep diagrams of your planting area to double check individual labels on the plants.

The digging and separating is best done between one and two months after bloom season, usually in July or August for this Idaho area. Soon after this the irises grow roots which help to hold the plant firmly during the winter in areas where freezing and thawing can result in heaving the rhizome out of the ground. Some member’s mulch in the winter but you will want to remove the mulch early in the spring to prevent rotting of the rhizomes.

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