What’s the difference between knockout roses and double knockout roses?
The difference between the Knockout Rose and the Double Knockout Rose? Easy – the ‘single’ and ‘double’ refer to the appearance in terms of petals. The Double Knockout Rose appears to have a secondary flower in the center, doubling the flower quantity. Sunlight – Double Knockout Roses require between 5 and 6 hours of sunshine daily. Plant in full sun. Soil – Prefers well-drained, acidic, moist soil that is not overly wet.Plant Knock Out roses in the spring or fall. Pick a spot where they’ll get at least six hours of sunlight. Getting the light right is key: if Knock Out roses don’t get enough sun, they bloom less and grow slowly.Knock Out® Roses can grow fairly large in some parts of the country if not cut back. Periodic trims will keep them maintained at a smaller size (on average 3–4′ wide x 3–4′ tall). A once a year cut (to about 12–18 above the ground) in late winter/early spring is also recommended for maximum performance.Double Knockout Roses usually only reaches between 3 and 4 feet tall, making it an easy shrub to fit into small garden spaces. Additionally, these roses grow well in rows or groups.Pick a Sunny Place to Plant Your rose bush will need at least 6-8 hours of sun each day, so choose a sunny spot to plant.
What is the difference between knockout roses and double knockout roses?
From the same cross that produced the original Knock Out®, Double Knock Out® represents the next generation in The Knock Out® Family of Roses. The full, double flowers look just like a classic rose. It is as resistant to black spot as the famous original, has the same bloom cycle, and is slightly more winter hardy. To maintain a size of 3–4′ w x 3–4′ h, Knock Out® Roses should be cut back once a year to 12” high. Check your rose bush from time to time in late winter/early spring, and when you start to see new shoots growing from the canes on your rose bush, that’s a good sign that it’s time to prune.Grow Knock Out® roses in full sun to partial shade in neutral to acidic, moist, loamy soil with good drainage. It is one of the few roses that will bloom reasonably well in partial shade. They grow to 3-4 feet tall and wide and requires less pruning than most roses, needing attention only to manage the plant’s size.You actually don’t need to deadhead Knock Out roses. They’ve been bred to not produce rose hips, so they keep putting their energy into new blooms.The Knock Out is an easy-care rose that produces flowers nonstop from spring through fall. It’s easy to grow in a wide range of soils, it’s disease resistant, and it’s self-cleaning — meaning no deadheading!Knock Out® Roses are tough and can make it through anything. But, if you live in an area with harsh winters (zones 4 and below) there are a few things you might want to try.
What are the cons of Knock Out Roses?
When weather conditions are ideal, Knockout roses can become infected with powdery mildew, rust and even some black spot. More trouble is rose rosette, a new virus disease spread by a small eriophyid mite. It can turn healthy roses into monsters of contorted, crinkled, red stems and leaves. Unfortunately, it faces a fatal disease (as do other roses) called rose rosette. This virus spread by a tiny mite distorts the flowers and causes weird bunches of bright red stems to grow. Eventually, the plant dies.Knock Out’ roses bloom on new growth. This means that you can prune it almost anytime you want without ruining the season’s bloom.The Knock Out® Family of Roses are the most disease resistant roses on the market making them easy to grow. All of the Knock Out® Roses are self-cleaning so there is no need to deadhead. For best performance, cut back every year.Almost any common insect pest of roses, including aphids, Japanese beetles, mites, rose slugs and thrips, can infest Knockout roses. Particularly devastating in southern states has been the chilli thrip, which attacks many fruits, vegetables and ornamentals, including roses but especially Knockouts.
Where is the best place to plant double knockout roses?
Just like other roses, The Knock Out® Family of Roses perform best when planted in full sun. The soil should be well drained and fertile. In partial shade, they will not bloom as profusely and can get leggy looking. Knock Out’ roses bloom on new growth. This means that you can prune it almost anytime you want without ruining the season’s bloom. If you prune in early spring, you’ll remove some flower buds and delay flowering, but you’ll get lots of blooms in a couple of weeks.To maintain a size of 3–4′ w x 3–4′ h, Knock Out® Roses should be cut back once a year to 12” high. Check your rose bush from time to time in late winter/early spring, and when you start to see new shoots growing from the canes on your rose bush, that’s a good sign that it’s time to prune.From the same cross that produced the original Knock Out®, Double Knock Out® represents the next generation in The Knock Out® Family of Roses. The full, double flowers look just like a classic rose. It is as resistant to black spot as the famous original, has the same bloom cycle, and is slightly more winter hardy.It’s best to choose a sunny location when planting Knock Out roses. Knock Out roses will bloom the best in locations having a minimum of six hours of direct sunlight,” says Heidi Mortensen, rose portfolio manager for Star Roses and Plants and brand manager for Bloomables.Double Knock Out Roses prefer moist soil that’s not oversaturated. Check on your soil every few days – if it starts to feel dry, then it’s time to give your roses a drink. Soil in containers tends to dry out faster than ground soil, so Double Knock Out Roses planted in containers may require water more frequently.
Do you need to prune double knock out roses?
Pruning – After Planting Pruning should occur as soon as possible, before or after planting, and with sharp pruning shears. Containers: Although it’s not essential after planting, light pruning can help shape a Double Knock Out® Rose shrub. Plant Knock Out roses in the spring or fall. Pick a spot where they’ll get at least six hours of sunlight. Getting the light right is key: if Knock Out roses don’t get enough sun, they bloom less and grow slowly.Pruning – Through-out the Season Always cut to just above a bud. Top back some branches to improve the general shape. Cut the shrub back to at least ½ its original size to promote new growth from the base. Deadhead all roses weekly to channel energy into new shoots and more flowers.Blooming and Fertilizing Knock Out® Roses will repeat-bloom from spring to frost regardless of deadheading. Deadheading does offer a cleaner, tidier look. Often people choose to deadhead to remove the faded blooms.Double Knock Out roses are very easy to grow. Give the plants full sun in a garden spot with fertile, well-drained soil and space them about four feet apart to allow good air circulation. To keep the blooms coming, fertilize your Double Knock Outs after every bloom cycle with any good rose fertilizer.Pinching: Pinching the tips of new growth will encourage the plant to branch out and become bushier. This should be done when the new growth is about 2-3 inches long. Pruning: Pruning your roses regularly will help to control the size of the plant and promote bushier growth.