'Knock Out' Rose
Rosa 'Radrazz'
Flower Color: Cherry red
flowers in bright sun,
lighter red in part shade or persistent cloudy conditions. Flowers
multiple times every summer. A very heavy flowering selection.
Size: 3-4' in height and 3-4' in width. Pruning is required to maintain that the 3-4' size. Rapid growth in early spring.
Foliage Color: Dark green with reddish-purple new growth. Very nice and clean. 'Knockout' Roses are very disease resistant and display very nice foliage. Vigorous growth can be expected.
Hardiness Zones: 5-9. Good performer in most areas of the US.
Light Requirement: Full Sun to Part-Shade. Better growth and flowers in the sun.
Drought Tolerance: Moderate, prefers moist well-drained soil. Additional summer watering increases flower production.
Notes: Patented variety, propagation is prohibited. Hybridized by William Radler and introduced by Conard-Pyle Co. and Star Roses. Very disease resistant. Many new hybrids don't live up to the hype, but this one exceeds it. Re-blooms every 4-6 weeks. Very widely available. Spring fertilization with slow-release fertilizer. One of the best sellers in the trade.