H. ‘Knockout’

Overview

Registered in 1986 by P. Aden, this small hosta cultivar forms a compact mound of blue-green leaves with creamy white margins. The leaves measure 6 inches (15.2 cm) long by 3 inches (7.6 cm) wide, with six vein pairs, and the margins transition from creamy yellow to white as the season progresses. The plant reaches 8 inches (20.3 cm) in height and spreads to 12 inches (30.5 cm) in diameter.

In the Garden

Hosta 'Knockout' performs best in partial to full shade, where its blue-green foliage and white margins remain most distinct. Its small mature size makes it suitable for the front of borders, rock gardens, or as an edging plant along pathways. It pairs well with other small shade perennials such as ferns, heucheras, or miniature hostas, and is well-suited for container cultivation due to its compact habit.

Care Notes

Water regularly to maintain consistent soil moisture, particularly during dry periods. Apply a balanced slow-release fertilizer in early spring as new growth emerges. Like most hostas, this cultivar is susceptible to slug and deer damage, and protective measures may be necessary in areas where these pests are prevalent.