The most well known "black" roses are Black Magic, Black Baccara and Black Jade. But none of these roses are actually black. They are a dark red with deep red, almost black, edging and buds. The Black Jade is a popular small flowered rose that loves at least six hours of sunlight each day.
Plant the black rose plant in well-drained soil. It should not be so sandy that it holds little moisture. You can amend soil that has too much clay, as well as soil with too much sand, by working compost into the soil. There is an easy way to hand test your soil (see tips).
Loosen the soil with a pick or shovel, in the area where you will be planting the black rose bush. Place 2 inches of compost on top and work it in. Aside from amending the soil, compost adds important nutrients for a new rose bush.
Dig a hole as deep as the container for the bush. Dig the hole 4 inches larger, all the way around.
Remove the black rose bush from its nursery container. Hold it around the stem, close to the soil, and turn the pot upside down. If the plant does not readily release from the container, give it a couple of thumps, with the heal of your hand, on the container bottom. Place the bush into the hole, working soil in around it, until it is compact.
Water the plant thoroughly. From this point on, water the bush to keep it moist. Never water so much that the plant is sitting in a puddle of water. Black rose bushes like to be kept moist, but if you allow it to stand in water, it can develop mold.
Fertilize the bush in early spring and midsummer. Use a rose fertilizer, which has nutrients formulated explicitly for roses. For very young plants, you may choose to use a fertilizer with a little more phosphorus, such as a 10-15-10, for the first feeding, in order to strengthen the root system.
Clip off any brown spotted leaves as they appear. The biggest problems arising with rose bushes are mold and fungus. If the brown spotted leaves become prevalent, spray the bush with a fungicide.
Trim the bush during the winter months. Leave only 4 to 6 inches of the stalk above the ground.