According to Genesis, the first thing Noah planted after the Flood was a vineyard. Genesis 9:20 says that Noah began farming and planted a vineyard after the family had left the Ark.
The account then says Noah drank wine made from the vineyard’s produce and became drunk. This episode follows the covenant passages in Genesis 9 and is separate from the earlier olive leaf brought by the dove. The olive leaf indicates that vegetation had reappeared; it is not described as Noah’s first planting.
The wording is sometimes summarized as Noah becoming a farmer, but the specific crop named by Genesis is a vineyard. A vineyard is a cultivated area of grapevines rather than a single tree or a general grain field.
This detail also helps distinguish the post-Flood events from the bird episodes in Genesis 8. Noah’s planting occurs only after the Ark story’s landing and covenant scenes have advanced into Genesis 9.