Knock Out® Roses: Colors, Variety, and Care
Knock Out® Roses are fairly new to the gardening scene. Over the past 10 years these Roses have become insanely popular for their delicate, colorful, plentiful flowers that bloom throughout 3 seasons as well as their pest and disease resistance and extremely easy care.
Knock Out® Roses have fabulous colors including red, pink, blush pink (blushing), yellow (sunny) and white.
Varieties of Knock Out® Roses
You have a few different choices when it comes to Knock Out® Roses.
You can have either Double or Single blooms. The Red and Pink varieties have the Double blooms and the Yellow, White and Blushing varieties have the single blooms. The different shapes you can choose from are the standard rose bush or the super cool tree form.
Caring for Knock Out® Roses
You can plant Knock Out® Roses any time of the year, taking care to avoid the most extreme temperatures in winter and summer.
Choose the Ideal Location
The Knock Out Rose thrives in full to partial sun. More sun will also guarantee the most blooms and best color. These roses are extremely adaptable, but add a bit of compost or potting soil if your soil is overly sandy. Make sure the site you choose does not have standing water. This causes disease and even death.
Water in well when planting. Keep soil moist for the first month. Once established, allow the soil to dry before watering. Knock Out® Roses, once established, are quite drought tolerant and don't require much supplemental watering except in hot, dry periods.
For best performance apply a slow release fertilizer twice a year in early spring and again in summer. Applying a slow release fertilizer when planting your rose bush is also recommended.
Knock Out Roses do not require pruning. However, pruning can help maintain vigor, strength, size, and shape, as well as encourage better blooming. We recommend pruning back your Knock Out® Roses in late winter or early spring, leaving about 1 foot of height remaining.
Pests and Disease
The most important thing to remember with any plant is that a healthy plant is less likely to be attacked by disease and pests. Knock Out Roses are pest and disease Resistant not Free, so while these plants do tend to have fewer problems than traditional rose bushes, problems can occasionally pop up. Powdery Mildew and other fungal diseases can be treated with fungicides. Fungicides are best used as a preventative rather than a treatment. So they are more of a go to when you have a history of these problems. A great product for treating for pests and fungal disease organically is neem oil. I have known many gardeners including myself that have seen great results with this harmless product. We don't see a lot of insect problems with Knock Outs, but Rose Slugs, which are actually the larvae of a Sawfly do like to chomp on the leaves. These can be treated organically with neem oil or insecticidal soap. Be sure to coat the underside of the leaves well as this is where the slug hangs out and eats. You may need to apply a couple treatments. You can certainly apply a systemic insecticide to treat this pest if you prefer that route which is what we have found to be the best route.