underplanting

/AH1 N D ER0 P L AE1 N T IH0 NG/
verb
  1. 1

    To plant underneath.

  2. 2

    To plant too little of.

noun
  1. 1

    An arrangement of underplants.

Source: https://en.wiktionary.org/wiki/underplant, https://en.wiktionary.org/wiki/underplanting