Spiderwort-Another old world favorite, Mom and Grandma probably grew. These are grassy leaf perennials with tiny 3-petal flowers. The flowers come in shades of pink, purples, blues and white. Some of the new varieties are very exciting. Purple foliage with light pink flowers. Yellow foliage with deep blue flowers. Native to prairies and woodlands spiderwort can tolorate challenging conditions. They are best grown in ordinary moist well-drained soil. They like sun or semi-shade. They grow to heighs of 20 inches.