Genshin Impact includes a whole bunch of different items that you can collect and use to your advantage. While some of them can be used directly, others are effective when combined with more items. Similarly, Radishes come under the category of cooking ingredients, which can be found in the wild of Mondstadt. They are rich in fiber and nutrients and are easy to grow and harvest.
Radishes can be used in Radish Veggie Soup to boost the ATK of all party members by 65 to 92 for 300 seconds and in Fried Radish Balls to restore the max HP of the chosen character by 8 to 10%. It will also regenerate 210 to 300 HP every 5 seconds for the next 30 seconds. Radishes are obtained by scavenging, and here is the list of locations to find Radish in Genshin Impact.
There are three places in Dawn Winery where you can find a bunch of Radishes, specifically in the vegetable gardens in the south. You might also find a bunch of Carrots there with them.
Radishes can also be found right next to the lone house present in the southeast direction from the waypoint in Stone Gate. Refer to the image attached if you are unable to find the location.
Springvale is close to Dawn Winery — thus, you can explore these two locations together to find Radishes, and surely you will get plenty of them. The location of the Radishes is marked in the above image.