Bearded irises can be beautiful!
Irises multiply fairly quickly and when they become overcrowded they produce fewer blooms. To ensure abundant flowers on your irises, the plants should be divided every three to four years.
The best time to divide and transplant irises is two to three weeks after they’re done blooming for the season, through the end of August.
This is how you divide them:
The roots are known as rhizomes. Dig them out, wash with plain water and inspect them. Keep only the young healthy rhizomes. Discard any that are shriveled or have holes in them, or any that
are soft and mushy.
Before replanting the iris leaves should be cut back to about six inches.
To replant the healthy rhizomes, dig a shallow hole with your trowel and set each rhizome in the hole about 8 inches apart, carefully spreading out the roots on each rhizome. Add a granular bulb
fertilizer to the hole at this time to keep your irises happy.
Irises will bloom poorly or not at all if the rhizomes are planted too deeply. They should be barely covered with soil. The upper surface of the rhizomes should be at the soil level.
Get ready for an explosion of extravagant flowers next spring.
Have a great week!