New Zealand Flax has become a favorite for those seeking bold vertical interest in the garden, but many gardeners don't realize quite how big it can get. For those with smaller spaces, be it in the ground or in large container planters, consider 'Shiraz' as the perfect solution. This burgundy-red specimen tops out around two to three feet tall and not quite as wide, maintaining its dark good looks throughout the year. Hardy to 10 degrees, 'Shiraz' will look its best when given regular if infrequent watering, and could even serve as a low informal hedge.