Why haven't several vines ordered online years ago sprouted yet? The climate is over 20 degrees. Other people's vines have sprouted. Could they be dead?

Dig it out and see if the root is rotten. Roots can't germinate when they are rotten. Generally, it germinates in April in the solar calendar after Tomb-Sweeping Day, and the climate and environment vary from place to place. It can't be said that it germinated and unearthed at 20 degrees in three or five days. There is a great temperature difference between day and night now.

Grapes should be pruned every year. Grapes are light-loving fruit trees. Planting grapes requires high terrain and is not easy to accumulate water.