Some plants need to come with a warning label, including the yellow flag iris. Twenty or so years ago, I dug one out of my ...

Excessive heat and sun in hot climates like yours can also stress these plants.” Backyard Tip: Yellow flag iris is an invasive perennial and is considered a noxious weed in many states.

Division should be done after the blooming cycle is complete and foliage has started to yellow, usually in July. For dwarf and Dutch irises, dig up and separate bulblets from the mother bulb every ...