Rosa Knockout 'White' is a bright floriferous shrub rose producing pure white blooms with subtle yellow centers over glossy green foliage. With exceptional resistance to black spot and no need for deadheading, this rose provides high impact color from late spring through frost in formal or casual garden settings.
Height & Spread: 3 - 4 ft x 3 - 4 ft
Bloom Time: Late spring to frost
Light Requirements: Full sun
Soil Preference: Moist, fertile, well drained soil
Watering Needs: Moderate; prefers consistent watering in dry periods
Deer Resistance: Generally unpalatable to deer but may be browsed when tender
Native Status
This is a cultivated hybrid rose, bred from non native parent species. It is not native to North America but is widely grown for ornamental purposes.
WILDLIFE & INSECTS
Bees
- Visited by small native bees and honeybees collecting nectar and pollen during each bloom cycle.
Beneficial Insects
- Provides support for predatory insects that help keep aphid populations under control, reducing the need for pesticides.
Spacing & Landscape Use
Spacing Recommendations
- Space 36 - 48 in apart to ensure proper airflow and full form development.
Landscape Placement
- Ideal for mass planting, shrub borders, or as a single accent shrub in mixed beds. Works especially well in white or moonlight themed gardens.
Companion Plants
- Leucanthemum x superbum (Shasta Daisy) - Offers clean white blooms and similar growth habits in full sun borders.
- Geranium sanguineum (Bloody Cranesbill) - Forms a hardy ground layer with magenta blooms that accent white flowers.
- Calamagrostis x acutiflora 'Karl Foerster' - Adds vertical structure and movement in the background of rose groupings.
- Lavandula x intermedia 'Phenomenal' - Provides aromatic foliage and purple flower spikes that contrast with white roses.
- Salvia officinalis 'Berggarten' - Adds silvery foliage and herbal scent with excellent heat tolerance.