How do I make a custom crop grow in villages?

Without custom code, and possibly modifying the village generation code (as well as villager), this won't currently be possible using MCreator's built-in procedures or elements.

Now that I think about it, it could be possible to use very specific spawn conditions in your procedure to check for villages nearby/farmland to generate the plants on, but I'm not too sure how well it would work out. But as for the villagers, you would need custom code.