Silver Anniversary YuccaA cross between Yucca filamentosa and Yucca pallida, 'Silver Anniversary' is grown for its architectural, evergreen foliage as an accent in the garden border or in urns or other large containers. Its dusty blue color is a striking contrast to many softer plants in the landscape, and late spring brings a huge, 7' flower spike that is truly stunning! Use in the hottest, sunniest spots in your garden where few other plants will survive without constant