Modifiers matching weeds:

• agronomic,
• large,
• annual,
• aquatic,
• broadleaf,
• noxious,
• harmful,

Simple categories matching broadleaf:

• evergreen,
• crop,
• forage,
• species,
• tree,
• plant,
• forest,
• taxon,
• weed,
• shrub,
• organism,
• weeds,
• wood,