Replant it!

Replant it! is a client-side mod that automatically takes care of replanting your crops. Every time you harvest mature crops, the mod instantly identifies the appropriate seeds in your inventory and temporarily switches your held item to immediately plant new seeds in the vacant spot.

After planting is completed, the tool or item you were holding before harvest is automatically returned to your hand. The only requirement for the mod to function is having the corresponding seeds among your items.

By the way, there's a way to bypass the mod's behavior — just don't hold anything in your hand during harvesting :)

Important: Some servers may consider using this modification as giving the player an unfair advantage.