An excellent medium-early maturing variety, can be harvested after 62-67 days from transplanting. Heads are medium sized and medium-high domed with very fine beads of green color, very compact and firm. Excellent uniformity and good head exsertion makes it fit for mechanical harvesting. Very few hollow stems. Tolerant to Black Rot disease and Downy mildew. ROCK shows good performance in mild weather conditions as well as somewhat arid regions.