The grafting procedure is a relatively simple horticultural technique that can be used to join two plants together. The first step is to select healthy rootstock and scion material. The rootstock is the lower part of the plant, and the scion is the upper part of the plant. The rootstock should be a few inches taller than the scion.
The next step is to make a sloping cut in the rootstock and in the scion. The cuts should be made at a 45-degree angle and should be about the same size.
The rootstock and scion are then joined together. The cut surfaces should be aligned and held together with grafting tape or rubber bands. The graft union should be covered with grafting wax or grafting paint to protect it from the elements.
The grafted plant is then placed in a warm, humid environment. The graft should be kept moist, but not wet.
The success of the graft depends on a number of factors, including the health of the rootstock and scion material, the skill of the grafter, and the environmental conditions. In general, the success rate for grafting coffee is high.
In the case of grafting Coffea eugenioides on Coffea excelsa, the success rate has been very high. This is because both coffee varieties are closely related and have similar growth habits. The graft in the picture is about 2 months old and the plant appears to be healthy.
The mixing and matching of scion and rootstock has the potential to help coffee growers adapt to climate change and other challenges facing the coffee industry. By grafting together different coffee varieties, growers can create plants that are more drought tolerant, disease resistant, and productive.