This is probably not it since they are saints

But I feel like that this is where they aren’t actual seeds. It reminds of a small story in a manga where a king gives the seeds to these people and says something like growing this will help me decide if you will be king or Who I will adopt. And then everyone at the end has all these glorious plants except this one child and he chose that child because he kept with the “seed” he gave him and didn’t switch it out and lie about growing it.


Edit:Spoiler







I read the raws it isn’t like that but our MC has the tallest plant