6x Japanese holly 'Caroline Upright' - Hardy plantA proud plant! This is how we describe the Japanese holly 'Caroline Upright' (Ilex crenata). The branches grow upwards. The 'Caroline Upright' has dull, dark green, pointed leaves. The holly is evergreen and winter hardy! Prune or shape the holly in spring and summer. Position the plant in a place with plenty of sunlight. Water the plant sparingly. Only give extra water during dry periods.