It is not accepted as a species by the World Checklist of Selected Plant Families as of August 2011[update],[2] and has been relegated to cultivar status by Schmid.

[3] Tolerating temperatures as low as −30 °C (−22 °F),[4] H. 'Undulata' and its related cultivars are widely grown in temperate zones.

Over time (or as a cultivar selection), the white center can narrow to a form classified as H. 'Undulata Univittata'; the displayed picture is more of this type.

In areas with significant summer heat, or where planted in too much light, the white-centered forms are also prone to a greening of the leaf centers, shown as a misting that darkens with the season.

The flower scapes of all H. 'Undulata' cultivars are tall and offer pale lavender blossoms which are very attractive to bees.