Grape Starter

Plant these in the fall. Takes 10 days to grow, but keeps producing after that. Grows on a trellis.
Overview
Grape Starter is a type of seed. When planted, it grows into a mature plant that produces Grapes.
It can be bought from Pierre's General Store and JojaMart, and it may also appear at the Traveling Cart. During the Night Market, it is sold by the Magic Shop Boat on Winter 17. Like other seeds, it can also be obtained by putting items into the 
Because it is a starter seed rather than a harvest itself, Grape Starter is mainly useful for setting up a 
The item is part of the normal seed economy in Stardew Valley, so its availability depends on the season and the shop or source you are using. 
Official description
Plant these in the fall. Takes 10 days to grow, but keeps producing after that. Grows on a trellis.