Aristea spiralis Iridaceae Frederick Coe, Ross Although Aristea eckloni has smaller, very blue flowers and is easy to grow, it is also a weed in most gardens as every seed germinates and grows vigorously. The plant shown has 1.25-inch pale blue flowers, usually 2 or 3 to a stalk each day and does not set seed. It is a clump former with 0.25-inch wide iris-like evergreen leaves about 10 inches high. The flowering stalks are 20 inches high and bloom over a period of 2-3 weeks in late winter. Unfortunately, the flowers closed before the plant was brought in. Native to South Africa and drought tolerant.