Modifiers matching grass:

• commercial,
• agricultural,
• annual,
• natural,
• native,
• susceptible,
• common,
• new,
• terrestrial,
• related,
• tropical,
• useful,
• perennial,
• aggressive,
• tall,
• edible,
• indigenous,
• exotic,
• smaller,
• hard,
• favorite,
• invasive,
• temperate,
• alien,
• dry,
• nutritious,
• unwanted,
• wild,
• soft,
• sized,
• nonnative,
• weather,
• ornamental,
• foreign,
• fine,
• small,
• weedy,
• short,
• herbaceous,
• light,
• low,
• familiar,
• dried,
• large,
• nonwoody,
• model,
• larger,
• tolerant,
• european,
• thick,
• monocotyledonous,
• decorative,
• local,
• artificial,
• tiny,
• underwater,
• tough,
• important,
• out,
• domestic,
• sensitive,
• coarse,
• woody,
• aromatic,
• desirable,
• subtropical,
• domesticated,

Simple categories matching perennial:

• herb,
• group,
• plant,
• pest,
• host,
• flower,
• native,
• vegetable,
• shrub,
• crop,
• clover,
• tree,
• allergen,
• grass,
• seed,
• river,
• planting,
• legume,
• weed,
• ornamental,
• issue,
• veggie,
• antigen,
• wildflower,
• pasture,
• bunchgrass,
• vine,
• fruit,
• forage,
• species,