Often, we draw comparisons between the worlds of tea and wine. From the similarities in wine varietals and tea cultivars, to tradition in preparation and processing, we find even more parallels in utilizing root stock to create heartier, healthier and more nuanced offerings from wine to tea. Though the idea of grafting is perhaps more spoken about in wine or other horticulture applications, in tea, we can utilize grafts to produce higher performing gardens.
Perhaps the most heroic story of grafting in wine comes to us from the Phylloxera epidemic of the 1860s in France. Phylloxera are almost microscopic aphid-like insects that devour the roots and leaves of grapevines responsible killing more than 70% of the vines. During the years after this epidemic, an independent group of researchers including Frenchman, Jules Émile Planchon, and American, Charles Valentine Riley, discovered that when they utilized American rootstock it stopped the tiny insect. Without chemical control, the wine community used phylloxera-reistant American rootstock to replace the roots of less-resistant European vines. With this innovative solution, many of the popular grape varietals were saved, but some were not replanted.
Carménère was one of the varietals particularly difficult to grow, so it was thought to be extinct for nearly 100 years. However, in Chile in 1994, Jean-Marie Boursiquot, a French Ampelographer, or person who studies and classifies grape varietals, and winemaker, Claude Valat found that a section of Merlot vines that seemed to be ripen significantly later than the others. Through analysis, the two realized they had actually discovered Carménère vines!
During the 19th century cuttings of Carménère were accidentally imported from Bourdeaux by Chilean growers. Apparently, phylloxera hadn’t reached Chile and the varietal had indeed survived! In the wine world, this story is revered as a true success and illustrates the power of horticulture.
Even today, grafting is common, because the rootstock does not change how the wine grapes develop, as the desired genes are contained in the part of the graft called the scion, which is taken from the grapevine. Through choosing the rootstock, one can choose the adaptability to certain soils and weather, as well as overall heartiness.
The practice of grafting wine vines and tea bushes is quite similar. In tea grafting, the scion is prepared from a green tip and should contain two nodes and two leaves from the lateral bud to promote growth and likelihood to succeed in growing.
