Box Tree Topiary is already shaped for you and these Box Balls just need maintaining with a light trim a couple of times per year. Leave a little growth on each time if you want them to get bigger. Box Trees are evergreen and grow best in well drained fertile soil or, if growing in a pot, us a 50/50 mix of John Innes and multipurpose compost. Sun or part shade. Always water box ball in pots by wetting the soil rather the foliage, wet foliage can encourage a disease called box blight. Feed with seaweed fertiliser in the growing season, this can be applied once or twice as a foliar feed