You will be able to find several berry bushes during your adventure in Pokémon Brilliant Diamond and Brilliant Pearl. These Berries are useful for your Pokémon as treats to heal them or increase specific traits about them, such as their beauty, friendship, or happiness. After picking a berry from a bush and planting another, how long does it take for the berries to grow in Pokémon Brilliant Diamond and Brilliant Pearl?
After planting a berry, it will take 24 hours for the berries to grow back. You will have to wait a full day for them to reappear after planting them. If you want to increase the number of berries you receive after planting them, all you need to do is water the berry bushes every now and then after planting them in the ground.
We checked and if you turn off the Pokémon Brilliant Diamond and Brilliant Pearl app and advance the time on your Nintendo Switch, the berry bush never appeared. You will have to wait for the game to progress 24 hours and you will be able to collect berries from the bushes. If you are looking to grow berries, it seems like you are a bit out of luck until you wait for the specified amount of time.