Nagano purple grapes, also known as Nagano pearls, are varieties cultivated in Nagano Prefecture, Japan, with parents such as Kyoho and White Rosa. The variety was registered in 2004 and introduced into the country in 2009. Nagano purple grapes have cylindrical spikes weighing between 400 and 780 grams, obovate in shape, and purple-black skin. It is characterized by large fruits, weighing 10-30 grams, and the sugar content can reach 18-20 degrees. The flesh is similar to that of the paternal White Rosa, which is naturally seedless, and the skin is thin and can be eaten with the skin. The advantages include large fruit grains, large fruit spikes, strong strawberry aroma, crisp taste, good coloring, good flower bud differentiation, seedless, thin skin, easy to eat with skin and vigorous growth. The disadvantage is that there is a residual core to be treated, and the peel has a slight astringency if it is not handled properly.
For planting Nagano purple grape seedlings, it is first necessary to spread farm fertilizer on the ground to ensure that there is enough base fertilizer. It is also necessary to dig a fixed value hole, and the specific depth is determined according to the size of the seedlings. Although grapes are vines, they can be grown using cuttings, strips, etc. However, this method takes a certain amount of time to grow before it begins to bear fruit, and if you want to grow it individually, you can also choose to buy the cultivated vines and transplant them. During the planting process, fertilizer and spraying should be applied regularly to prevent pests.
The above information is for reference only, it is recommended to consult experienced growers or consult agricultural books.