I wonder if you have a component similar to this moisture sensor:
Depends if you want just the moisture sensor or that and the relay. This google search “fritzing part soil moisture sensor” finds the various moisture sensors that have been made, I doubt the relay module exists as a part (although it may.) There doesn’t appear to be enough information in the web page to make a part for the relay module, the connection information is lacking.
Peter
I see. Thank you. I appreciate your help.