Is there any way to make this compatible with this seasons mod? Only make things grow a certain time of year?

I can look into adding support for it, I'll have to look through their repo to see how they do it to vanilla crops

Looking at it, you can add the seeds to their sereneseasons config and it will be applied to the seeds and crops, maybe I'll make a PR on their repo to try and get them added by default.

Pull Request made, I'll close this as it's up to them if they're going to accept it or not and you can also add it to the config on your end if you want.