Answer: Yucca plants are generally grown in the southwestern states, but in your long, hot summer region of eastern Washington, Yucca should perform well. Expect your plants to take a year to become established in their new homes, and another 3-4 years before they're mature enough to produce blooms. Yucca's grow best in full sunshine and average garden soil that's kept on the dry side. You may want to move your plants to an area where they'll get all day summer sun so they'll be happy enough to bloom for you. Yucca plants don't require acid soils, but coffee grounds are an acceptable source of nitrogen, attract red worms, and make a decent mulch around acid-loving plants.
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