Nomin Kanren no Sukiru Bakka Agetetara Nazeka Tsuyoku Natta - Vol. 7 Ch. 31.1

[MangaDex]

 

[Otherworlder]

If you want to keep them, they're not weeds. The type of plant isn't the deciding factor for weediness, only the location. A rosebush growing in the middle of a corn field would be a weed, since it isn't wanted there.