How to Care for the Nation's Favorite Flower
Customer photo by Theresa B. of Fleetwood, Pa.: "The variety of this rose is Honey Perfume. My husband bought me this rose bush last year for our third wedding anniversary present. It is a very special rose bush."
America's most popular flower is also one of the very oldest flowers in cultivation. There are more than 2,000 different rose varieties to lure us with their history and fragrance. This is because the rose, like the orchid, cross-breeds readily—a trait exploited first by nature, and then by horticulturalists. Today, we can choose from old-fashioned favorites, as well as modern varieties that are the result of intensive breeding programs throughout the world. The rose is a flower with a rich past, and an exciting future.
There are thousands of beautiful roses, far more than any of us will ever have the opportunity to see, much less grow. When choosing a rose for your garden, there are five considerations that should make the selection process easier.
1. Growth Habit
Though roses are usually planted for their flowers, it is important to know what the plant as well as the flowers will look like, in order to determine where it will fit in your garden.
Tea roses and cluster-bloomers (floribundas) usually grow no more than 2 to 3 feet high. Their form is coarse, but they do produce an abundance of flowers throughout the growing season. The hybrid tea has large, single blooms on long, stiff stems, whereas the floribunda has slightly smaller clusters of blooms on stems that are not as stiff.
Miniature roses have tiny flowers, and may be only 10 to 36 inches tall. They are ideal for containers.
Shrub roses, including both the old-fashioned and the modern types, and ground-cover or landscape roses, are generally large and leafy.
Climbers grow from 7 feet to 30 feet in length, and most of them benefit from some type of support.
Tree roses, or standards, are roses that are grafted into a tree-like form with a single stem and a rounded bush or weeping display of flowers on top.
Northern gardeners need to know exactly how hardy a rose is. Southern gardeners must also watch to see what zones are recommended for each particular variety, because some roses do not grow well in hot and/or humid weather.
3. Bloom Time
Many roses, especially the old-fashioned varieties, have just one flush of blooms per year. Will you be satisfied with a cloud of heavenly pink blossoms for three weeks in June, or do you need your rose to bloom all summer long? This consideration may narrow your choices very quickly.
4. Disease Resistance
Selecting a disease-resistant rose is the single most effective way to avoid problems and the need for chemicals. You might start by considering some of the old rose varieties, many of which have natural disease resistance. You can also look to many of the modern roses, which are now being bred for improved disease resistance.
5. Stem Length
This may seem like an odd consideration, but it's important if you are growing roses for cutting. The traditional florist rose is a hybrid tea, and it is the only type of rose that flowers on a long, stiff stem. All other roses have shorter, weaker stems, which gives them a more casual—some believe more beautiful—presence in a vase.
Caring for Your Roses
Roses are rather particular, and you should be aware of the growing conditions and care necessary to keep them happy.
Site: For most abundant blooms and greatest vigor, roses need to receive 6 to 8 hours of direct sunlight each day. In hot climates, they will appreciate receiving protection from the most intense afternoon sun. In cool climates, a fence or a warm south- or west-facing wall can add enough extra warmth to boost flower production and reduce winter damage.
Soils: Roses need good drainage and a rich, moisture-retentive soil, with a pH between 6.5 and 7. If your soil is heavy and wet, you may want to consider planting your roses in raised beds. Compost should be added to create a loose texture with a high organic content. For help correcting a pH imbalance, read Building Healthy Soil.
Water: Roses require more water than most other landscape plantings, especially during the first year as the plant is getting its roots established. The best way to water your roses is with drip irrigation. It concentrates the water at the root zone where it is needed, and keeps the foliage dry to minimize disease problems. A good, thick layer of organic mulch will help conserve moisture, reduce weeds, and encourage healthy root growth. As the mulch breaks down, it will also add organic matter to the soil.
Fertilizer: Roses are heavy feeders, and will benefit from a steady supply of nitrogen, phosphorus and potassium. You can provide these nutrients with either liquid or granular fertilizers, at a ratio of approximately 5-8-5. In most cases, regular applications of compost, rotted manure, fish emulsion and seaweed extracts will provide roses with all the nutrients they need. These organic amendments also help to moderate pH imbalances and stimulate beneficial soil life. Other organic amendments favored by rose growers include greensand, black rock phosphate and alfalfa meal.
Pruning: Dead, weak and sickly stems can lead to disease problems. Pruning these away will increase air circulation to the center of the plant and minimize fungus problems. Pruning also stimulates new growth, and allows you to shape the plant in a pleasing manner. Spent flowers should be removed during the growing season to encourage reblooming. Use a scissor-action pruner for the cleanest cuts.
Winter protection: If possible, select rose varieties that are hardy for your growing zone; ones that can survive the winter with no special protection. In cold climates, hybrid teas and floribundas, as well as some of the smaller shrub roses, will benefit from a little extra insulation.
Once you have had several weeks of below-freezing temperatures, cover the base of the rose with 12 inches of soil or mulch, and then cover the canes with straw, leaves, pine boughs or even foam insulation. Climbing roses can be wrapped right on their supports, or you can lay them on the ground and cover the canes with straw or brush. In severely cold climates, hybrid teas are sometimes partially dug up, laid down onto the soil, and the entire plant is then covered with more soil or mulch.
Pests and diseases: Prevention is the best way to avoid pest and disease problems. Start with disease-resistant varieties, keep plants in healthy condition (well fertilized and well watered), maintain good air circulation, keep foliage dry, and remove any diseased foliage or spent flowers. For persistent pest problems, you can use botanical insecticides such as sabadilla, neem, rotenone, and pyrethrins. These are broad-spectrum controls, meaning they kill many types of insects, both good and bad. Though they are organic, these controls are potent and should be used sparingly.
For caterpillars and Japanese beetle grubs, use Grub Guard or Milky Spore (Bacillus popilliae). Insecticidal soaps, such as Rose Rx are effective against scale, spidermites and aphids.