Replant them where they have space ... plant them in smaller clumps and divide as needed. To divide bulb irises like Dutch ...

Follow these steps when dividing irises. Using a shovel or spade, carefully remove the iris from the ground. Try to lift the ...

You may be able to simply pull plants apart, but if the roots are tough use a knife or even a spade. Discard very old, unproductive pieces of rhizome at the heart of the clump. Replant irises in ...

In my “Manuel of Herbaceous Ornamental Plants” by Steven Stills ... I have had the best luck transplanting and dividing ...

Diminished flowering, clumps that are overgrown or crowded, and a decline in general health in bearded (German) irises are ...