Long-stem roses are usually only sold by florists, and every Mother's Day, the price of long-stem roses skyrockets. They are beautiful with a long slender stem and a lovely single bloom. It would be nice if the home gardener could produce such perfect roses. Unfortunately, it is not that simple. Growing long-stem roses is not easy and takes a lot of work. However, if you have a greenhouse you might be able to grow long-stem roses.
Prepare your greenhouse. Long-stem roses need to be grown in a greenhouse because they need to be grown under very specific climate conditions. The temperature should be around 80 degrees Fahrenheit with a humidity between 60 and 70 percent. It is impossible for roses grown outside to have this climate constantly.
Prepare the containers for the long-stem roses. Be sure they are well-drained. Long-stem roses need a lot of water, but they do not need their roots to be drowned by it.
Plant your long-stem roses. They can be planted at any time because they are in a greenhouse. Place them in a container larger than the one they came in. Fill the rest of the container with a mixture of high-quality potting soil and compost. Pat down firmly.
Water your long-stem roses regularly, about two times a week. Be sure the soil is kept moist but not sopping wet. Apply rose fertilizer on a biweekly basis or per the manufacturers guidelines.
Prune back any extra buds on each stem, allowing only the top-most rose to remain. This ensures that flower will be the largest and the stems will be long, hence the name long-stem rose. Prune extra buds as they occur.
Deadhead any dead blossoms as they occur.