DENVER — Everybody loves iris, but as your garden becomes shadier over time, your iris may need sunnier locations. Even if you have plenty of sun, clumps need to be divided when they become ...

Question: I have mature bearded, Siberian and Japanese irises in the garden at the older house we bought this year. These have all finished blooming. How do I best care for them now through the summer ...

Owing to climactic conditions here in the Inland Northwest and my admittedly lazy ways, perennials in my garden have to meet a long list of criteria. They have to be heat and cold tolerant, drought ...