Modifiers matching weeds:

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

Simple categories matching broadleaf:

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