Blooming now in our Mixed Border is Yucca filamentosa 'Adam's Needle'. It is a native plant in the southeast. The base of the plant stays under 3 feet tall. The blue-green leaves end with a sharp spine, but along the margins you will find lots of fine threads. The flower spike reaches over 5 feet and will bloom for several weeks.
The interesting fact about this plant is that it has a unique relationship with the Yucca Moth. They cannot survive without each other. Click here for the MOTH STORY. This month's The American Gardener also has an article about this.