Genus Ilex Species crenata Cultivar 'Rocky Creek' Common Name 'Rocky Creek' Japanese Holly Patent ID Height 5 to 6 Feet Spread 5 to 6 Feet Habit Somewhat rounded habit, with contorted branches. Slow growth rate. Zone 6 to 9 Culture Full sun to partial shade. Flower Insignificant. Flower Color Foliage Small, dark green foliage. Evergreen. Category: Holly Description The twisted and contorted habit of this holly make it an interesting addition to the landscape.