Iris x hybrid
mid to late summer or fall
4" to 48"
average to rich, well-drained soil
best for zones 3 to 10 (mulch over winter in coldest zones)
greenish-silver, blade-like leaves
division of rhizomes
beds, accents, mass plantings, cut flowers and rock gardens
Start with purchased plants or bulbs. Bearded Irises are often sold as rhizomes for mid to late summer planting. Plant so that the upper half of the rhizomes is even with or slightly above the soil surface. Divide them in the spring every 3 to 4 years to keep them looking their best.
Bearded Irises are especially susceptible to borers. Symptoms include smelly, rotting rhizomes and larvae snacking on leaves. Giving plants full sun in a well-drained location and making sure irises are planted so rhizomes are on or above the soil surface will help prevent attacks.
Photo by Great Granny Vi